feat: initial project commit

2024-04-14 17:42:13 +02:00 · 2024-04-14 17:42:13 +02:00 · 30ef7bd477
commit 30ef7bd477
40 changed files with 3752 additions and 0 deletions
--- a/.editorconfig
+++ b/.editorconfig
@ -0,0 +1,447 @@
+root = true
+
+[*]
+indent_style = tab
+indent_size = 4
+tab_width = 4
+end_of_line = lf
+insert_final_newline = false
+trim_trailing_whitespace = true
+
+[.forgejo/workflows/*.yml]
+indent_size = 2
+indent_style = space
+
+[*.{xml,csproj,props,targets}]
+indent_size = 2
+indent_style = space
+
+[nuget.config]
+indent_size = 2
+indent_style = space
+
+[*.{cs,vb}] #### .NET Coding Conventions ####
+
+# Organize usings
+dotnet_separate_import_directive_groups = true
+dotnet_sort_system_directives_first = true
+file_header_template = unset
+
+# this. and Me. preferences
+dotnet_style_qualification_for_event = false:silent
+dotnet_style_qualification_for_field = false:silent
+dotnet_style_qualification_for_method = false:silent
+dotnet_style_qualification_for_property = false:silent
+
+# Language keywords vs BCL types preferences
+dotnet_style_predefined_type_for_locals_parameters_members = true:silent
+dotnet_style_predefined_type_for_member_access = true:silent
+
+# Parentheses preferences
+dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent
+dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:silent
+
+# Modifier preferences
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:silent
+
+# Expression-level preferences
+dotnet_style_coalesce_expression = true:suggestion
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_null_propagation = true:suggestion
+dotnet_style_object_initializer = true:suggestion
+dotnet_style_operator_placement_when_wrapping = beginning_of_line
+dotnet_style_prefer_auto_properties = true:suggestion
+dotnet_style_prefer_compound_assignment = true:suggestion
+dotnet_style_prefer_conditional_expression_over_assignment = true:suggestion
+dotnet_style_prefer_conditional_expression_over_return = true:suggestion
+dotnet_style_prefer_inferred_anonymous_type_member_names = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
+dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
+dotnet_style_prefer_simplified_boolean_expressions = true:suggestion
+dotnet_style_prefer_simplified_interpolation = true:suggestion
+dotnet_style_namespace_match_folder = false # resharper
+
+# Field preferences
+dotnet_style_readonly_field = true:warning
+
+# Parameter preferences
+dotnet_code_quality_unused_parameters = all:suggestion
+
+# Suppression preferences
+dotnet_remove_unnecessary_suppression_exclusions = none
+
+# ReSharper preferences
+resharper_check_namespace_highlighting = none
+
+[*.cs] #### C# Coding Conventions ####
+
+# var preferences
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+csharp_style_var_elsewhere = true:suggestion
+
+# Expression-bodied members
+csharp_style_expression_bodied_accessors = true:silent
+csharp_style_expression_bodied_constructors = false:silent
+csharp_style_expression_bodied_indexers = true:silent
+csharp_style_expression_bodied_lambdas = true:suggestion
+csharp_style_expression_bodied_local_functions = false:silent
+csharp_style_expression_bodied_methods = false:silent
+csharp_style_expression_bodied_operators = false:silent
+csharp_style_expression_bodied_properties = true:silent
+
+# Pattern matching preferences
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_prefer_not_pattern = true:suggestion
+csharp_style_prefer_pattern_matching = true:silent
+csharp_style_prefer_switch_expression = true:suggestion
+
+# Null-checking preferences
+csharp_style_conditional_delegate_call = true:suggestion
+
+# Modifier preferences
+csharp_prefer_static_local_function = true:warning
+csharp_preferred_modifier_order = public, private, protected, internal, static, extern, new, virtual, abstract, sealed, override, readonly, unsafe, volatile, async:silent
+
+# Code-block preferences
+csharp_prefer_braces = true:silent
+csharp_prefer_simple_using_statement = true:suggestion
+
+# Expression-level preferences
+csharp_prefer_simple_default_expression = true:suggestion
+csharp_style_deconstructed_variable_declaration = true:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+csharp_style_pattern_local_over_anonymous_function = true:suggestion
+csharp_style_prefer_index_operator = true:suggestion
+csharp_style_prefer_range_operator = true:suggestion
+csharp_style_throw_expression = true:suggestion
+csharp_style_unused_value_assignment_preference = discard_variable:suggestion
+csharp_style_unused_value_expression_statement_preference = discard_variable:silent
+
+# 'using' directive preferences
+csharp_using_directive_placement = outside_namespace:silent
+
+# 'namespace' preferences
+csharp_style_namespace_declarations = file_scoped:warning
+
+[*.cs] #### C# Formatting Rules ####
+
+# New line preferences
+csharp_new_line_before_catch = true
+csharp_new_line_before_else = true
+csharp_new_line_before_finally = true
+csharp_new_line_before_members_in_anonymous_types = true
+csharp_new_line_before_members_in_object_initializers = true
+csharp_new_line_before_open_brace = all
+csharp_new_line_between_query_expression_clauses = true
+
+# Indentation preferences
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents = true
+csharp_indent_case_contents_when_block = true
+csharp_indent_labels = one_less_than_current
+csharp_indent_switch_labels = true
+
+# Space preferences
+csharp_space_after_cast = false
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_after_comma = true
+csharp_space_after_dot = false
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_after_semicolon_in_for_statement = true
+csharp_space_around_binary_operators = before_and_after
+csharp_space_around_declaration_statements = false
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_before_comma = false
+csharp_space_before_dot = false
+csharp_space_before_open_square_brackets = false
+csharp_space_before_semicolon_in_for_statement = false
+csharp_space_between_empty_square_brackets = false
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_declaration_name_and_open_parenthesis = false
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_parentheses = false
+csharp_space_between_square_brackets = false
+
+# Wrapping preferences
+csharp_preserve_single_line_blocks = true
+csharp_preserve_single_line_statements = true
+
+[*.{cs,vb}] #### .NET Naming styles ####
+
+dotnet_naming_rule.types_and_namespaces_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.types_and_namespaces_should_be_pascalcase.symbols = types_and_namespaces
+dotnet_naming_rule.types_and_namespaces_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.types_and_namespaces.applicable_kinds = namespace, class, struct, interface, enum
+dotnet_naming_symbols.types_and_namespaces.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.types_and_namespaces.required_modifiers =
+
+
+dotnet_naming_rule.interfaces_should_be_ipascalcase.severity = suggestion
+dotnet_naming_rule.interfaces_should_be_ipascalcase.symbols = interfaces
+dotnet_naming_rule.interfaces_should_be_ipascalcase.style = ipascalcase
+
+dotnet_naming_symbols.interfaces.applicable_kinds = interface
+dotnet_naming_symbols.interfaces.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.interfaces.required_modifiers =
+
+
+dotnet_naming_rule.enums_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.enums_should_be_pascalcase.symbols = enums
+dotnet_naming_rule.enums_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.enums.applicable_kinds = enum
+dotnet_naming_symbols.enums.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.enums.required_modifiers =
+
+
+dotnet_naming_rule.type_parameters_should_be_tpascalcase.severity = suggestion
+dotnet_naming_rule.type_parameters_should_be_tpascalcase.symbols = type_parameters
+dotnet_naming_rule.type_parameters_should_be_tpascalcase.style = tpascalcase
+
+dotnet_naming_symbols.type_parameters.applicable_kinds = namespace
+dotnet_naming_symbols.type_parameters.applicable_accessibilities = *
+dotnet_naming_symbols.type_parameters.required_modifiers =
+
+
+dotnet_naming_rule.methods_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.methods_should_be_pascalcase.symbols = methods
+dotnet_naming_rule.methods_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.methods.applicable_kinds = method
+dotnet_naming_symbols.methods.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.methods.required_modifiers =
+
+
+dotnet_naming_rule.async_methods_end_in_async.severity = suggestion
+dotnet_naming_rule.async_methods_end_in_async.symbols = any_async_methods
+dotnet_naming_rule.async_methods_end_in_async.style = end_in_async
+
+dotnet_naming_symbols.any_async_methods.applicable_kinds = method
+dotnet_naming_symbols.any_async_methods.applicable_accessibilities = *
+dotnet_naming_symbols.any_async_methods.required_modifiers = async
+
+
+dotnet_naming_rule.parameters_should_be_camelcase.severity = suggestion
+dotnet_naming_rule.parameters_should_be_camelcase.symbols = parameters
+dotnet_naming_rule.parameters_should_be_camelcase.style = camelcase
+
+dotnet_naming_symbols.parameters.applicable_kinds = parameter
+dotnet_naming_symbols.parameters.applicable_accessibilities = *
+dotnet_naming_symbols.parameters.required_modifiers =
+
+
+dotnet_naming_rule.properties_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.properties_should_be_pascalcase.symbols = properties
+dotnet_naming_rule.properties_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.properties.applicable_kinds = property
+dotnet_naming_symbols.properties.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.properties.required_modifiers =
+
+
+dotnet_naming_rule.events_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.events_should_be_pascalcase.symbols = events
+dotnet_naming_rule.events_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.events.applicable_kinds = event
+dotnet_naming_symbols.events.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.events.required_modifiers =
+
+# local
+
+dotnet_naming_rule.local_variables_should_be_camelcase.severity = suggestion
+dotnet_naming_rule.local_variables_should_be_camelcase.symbols = local_variables
+dotnet_naming_rule.local_variables_should_be_camelcase.style = camelcase
+
+dotnet_naming_symbols.local_variables.applicable_kinds = local
+dotnet_naming_symbols.local_variables.applicable_accessibilities = local
+dotnet_naming_symbols.local_variables.required_modifiers =
+
+
+dotnet_naming_rule.local_functions_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.local_functions_should_be_pascalcase.symbols = local_functions
+dotnet_naming_rule.local_functions_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.local_functions.applicable_kinds = local_function
+dotnet_naming_symbols.local_functions.applicable_accessibilities = *
+dotnet_naming_symbols.local_functions.required_modifiers =
+
+
+dotnet_naming_rule.local_constants_should_be_camelcase.severity = suggestion
+dotnet_naming_rule.local_constants_should_be_camelcase.symbols = local_constants
+dotnet_naming_rule.local_constants_should_be_camelcase.style = camelcase
+
+dotnet_naming_symbols.local_constants.applicable_kinds = local
+dotnet_naming_symbols.local_constants.applicable_accessibilities = local
+dotnet_naming_symbols.local_constants.required_modifiers = const
+
+# private
+
+dotnet_naming_rule.private_fields_should_be__camelcase.severity = suggestion
+dotnet_naming_rule.private_fields_should_be__camelcase.symbols = private_fields
+dotnet_naming_rule.private_fields_should_be__camelcase.style = _camelcase
+
+dotnet_naming_symbols.private_fields.applicable_kinds = field
+dotnet_naming_symbols.private_fields.applicable_accessibilities = private, protected, protected_internal, private_protected
+dotnet_naming_symbols.private_fields.required_modifiers =
+
+
+dotnet_naming_rule.private_static_fields_should_be_s_camelcase.severity = suggestion
+dotnet_naming_rule.private_static_fields_should_be_s_camelcase.symbols = private_static_fields
+dotnet_naming_rule.private_static_fields_should_be_s_camelcase.style = s_camelcase
+
+dotnet_naming_symbols.private_static_fields.applicable_kinds = field
+dotnet_naming_symbols.private_static_fields.applicable_accessibilities = private, protected, protected_internal, private_protected
+dotnet_naming_symbols.private_static_fields.required_modifiers = static
+
+
+dotnet_naming_rule.private_static_readonly_fields_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.private_static_readonly_fields_should_be_pascalcase.symbols = private_static_readonly_fields
+dotnet_naming_rule.private_static_readonly_fields_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.private_static_readonly_fields.applicable_kinds = field
+dotnet_naming_symbols.private_static_readonly_fields.applicable_accessibilities = private, protected, protected_internal, private_protected
+dotnet_naming_symbols.private_static_readonly_fields.required_modifiers = readonly, static
+
+
+dotnet_naming_rule.private_constant_fields_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.private_constant_fields_should_be_pascalcase.symbols = private_constant_fields
+dotnet_naming_rule.private_constant_fields_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.private_constant_fields.applicable_kinds = field
+dotnet_naming_symbols.private_constant_fields.applicable_accessibilities = private, protected, protected_internal, private_protected
+dotnet_naming_symbols.private_constant_fields.required_modifiers = const
+
+# public
+
+dotnet_naming_rule.public_fields_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.public_fields_should_be_pascalcase.symbols = public_fields
+dotnet_naming_rule.public_fields_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.public_fields.applicable_kinds = field
+dotnet_naming_symbols.public_fields.applicable_accessibilities = public, internal
+dotnet_naming_symbols.public_fields.required_modifiers =
+
+
+dotnet_naming_rule.public_static_readonly_fields_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.public_static_readonly_fields_should_be_pascalcase.symbols = public_static_readonly_fields
+dotnet_naming_rule.public_static_readonly_fields_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.public_static_readonly_fields.applicable_kinds = field
+dotnet_naming_symbols.public_static_readonly_fields.applicable_accessibilities = public, internal
+dotnet_naming_symbols.public_static_readonly_fields.required_modifiers = readonly, static
+
+
+dotnet_naming_rule.public_constant_fields_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.public_constant_fields_should_be_pascalcase.symbols = public_constant_fields
+dotnet_naming_rule.public_constant_fields_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.public_constant_fields.applicable_kinds = field
+dotnet_naming_symbols.public_constant_fields.applicable_accessibilities = public, internal
+dotnet_naming_symbols.public_constant_fields.required_modifiers = const
+
+# others
+
+dotnet_naming_rule.non_field_members_should_be_pascalcase.severity = suggestion
+dotnet_naming_rule.non_field_members_should_be_pascalcase.symbols = non_field_members
+dotnet_naming_rule.non_field_members_should_be_pascalcase.style = pascalcase
+
+dotnet_naming_symbols.non_field_members.applicable_kinds = property, event, method
+dotnet_naming_symbols.non_field_members.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.non_field_members.required_modifiers =
+
+
+# Naming styles
+
+dotnet_naming_style.pascalcase.required_prefix =
+dotnet_naming_style.pascalcase.required_suffix =
+dotnet_naming_style.pascalcase.word_separator =
+dotnet_naming_style.pascalcase.capitalization = pascal_case
+
+dotnet_naming_style.ipascalcase.required_prefix = I
+dotnet_naming_style.ipascalcase.required_suffix =
+dotnet_naming_style.ipascalcase.word_separator =
+dotnet_naming_style.ipascalcase.capitalization = pascal_case
+
+dotnet_naming_style.tpascalcase.required_prefix = T
+dotnet_naming_style.tpascalcase.required_suffix =
+dotnet_naming_style.tpascalcase.word_separator =
+dotnet_naming_style.tpascalcase.capitalization = pascal_case
+
+dotnet_naming_style._camelcase.required_prefix = _
+dotnet_naming_style._camelcase.required_suffix =
+dotnet_naming_style._camelcase.word_separator =
+dotnet_naming_style._camelcase.capitalization = camel_case
+
+dotnet_naming_style.camelcase.required_prefix =
+dotnet_naming_style.camelcase.required_suffix =
+dotnet_naming_style.camelcase.word_separator =
+dotnet_naming_style.camelcase.capitalization = camel_case
+
+dotnet_naming_style.s_camelcase.required_prefix = s_
+dotnet_naming_style.s_camelcase.required_suffix =
+dotnet_naming_style.s_camelcase.word_separator =
+dotnet_naming_style.s_camelcase.capitalization = camel_case
+
+dotnet_naming_style.end_in_async.required_prefix =
+dotnet_naming_style.end_in_async.required_suffix = Async
+dotnet_naming_style.end_in_async.capitalization = pascal_case
+dotnet_naming_style.end_in_async.word_separator =
+
+[*.{cs.vb}]
+dotnet_diagnostic.IDE0055.severity = error
+# IDE0051: Remove unused private member
+dotnet_diagnostic.IDE0051.severity = error
+# IDE0052: Remove unread private member
+dotnet_diagnostic.IDE0052.severity = error
+# IDE0064: Make struct fields writable
+dotnet_diagnostic.IDE0064.severity = error
+
+dotnet_analyzer_diagnostic.severity = error
+# CS1591: Missing XML comment for publicly visible type or member
+dotnet_diagnostic.CS1591.severity = suggestion
+# CA1018: Mark attributes with AttributeUsageAttribute
+dotnet_diagnostic.CA1018.severity = error
+# CA1304: Specify CultureInfo
+dotnet_diagnostic.CA1304.severity = warning
+# CA1802: Use literals where appropriate
+dotnet_diagnostic.CA1802.severity = warning
+# CA1813: Avoid unsealed attributes
+dotnet_diagnostic.CA1813.severity = error
+# CA1815: Override equals and operator equals on value types
+dotnet_diagnostic.CA1815.severity = warning
+# CA1820: Test for empty strings using string length
+dotnet_diagnostic.CA1820.severity = warning
+# CA1821: Remove empty finalizers
+dotnet_diagnostic.CA1821.severity = warning
+# CA1822: Mark members as static
+dotnet_diagnostic.CA1822.severity = suggestion
+# CA1823: Avoid unused private fields
+dotnet_diagnostic.CA1823.severity = warning
+dotnet_code_quality.CA1822.api_surface = private, internal
+# CA1825: Avoid zero-length array allocations
+dotnet_diagnostic.CA1825.severity = warning
+# CA1826: Use property instead of Linq Enumerable method
+dotnet_diagnostic.CA1826.severity = suggestion
+# CA1827: Do not use Count/LongCount when Any can be used
+dotnet_diagnostic.CA1827.severity = warning
+# CA1828: Do not use CountAsync/LongCountAsync when AnyAsync can be used
+dotnet_diagnostic.CA1828.severity = warning
+# CA1829: Use Length/Count property instead of Enumerable.Count method
+dotnet_diagnostic.CA1829.severity = warning
+#CA1847: Use string.Contains(char) instead of string.Contains(string) with single characters
+dotnet_diagnostic.CA1847.severity = warning
+#CA1854: Prefer the IDictionary.TryGetValue(TKey, out TValue) method
+dotnet_diagnostic.CA1854.severity = warning
+#CA2211:Non-constant fields should not be visible
+dotnet_diagnostic.CA2211.severity = error
--- a/.forgejo/workflows/README.md
+++ b/.forgejo/workflows/README.md
@ -0,0 +1,15 @@
+# workflows
+
+## default.yml
+
+The default workflow which is ran on every `push` or `pull_request` which will
+build and package the project. This will also run the tests as part of the
+workflow to ensure the code actually behaves like it should.
+
+When the workflow runs on the `develop` branch of the repository, then an alpha
+build is released to the registry.
+
+## release.yml
+
+The release workflow just build the current repository ref and publishes the
+artifacts to the registry.
--- a/.forgejo/workflows/default.yml
+++ b/.forgejo/workflows/default.yml
@ -0,0 +1,37 @@
+name: default
+on:
+  push:
+    branches: ["main", "develop"]
+    paths-ignore:
+      - "doc/**"
+      - "*.md"
+  pull_request:
+    branches: ["main", "develop"]
+    paths-ignore:
+      - "doc/**"
+      - "*.md"
+
+jobs:
+  default:
+    runs-on: debian-latest
+    strategy:
+      matrix:
+        dotnet-version: ["8.0"]
+    container: mcr.microsoft.com/dotnet/sdk:${{ matrix.dotnet-version }}
+    steps:
+      - name: checkout
+        uses: https://git.geekeey.de/actions/checkout@1
+
+      - name: nuget login
+        run: |
+          # This token is readonly and can only be used for restore
+          dotnet nuget update source geekeey --store-password-in-clear-text \
+            --username "${{ github.actor }}" --password "${{ github.token }}"
+
+      - name: dotnet pack
+        run: |
+          dotnet pack -p:ContinuousIntegrationBuild=true
+
+      - name: dotnet test
+        run: |
+          dotnet test
--- a/.forgejo/workflows/release.yml
+++ b/.forgejo/workflows/release.yml
@ -0,0 +1,24 @@
+name: release
+on:
+  push:
+    tags: ["[0-9]+.[0-9]+.[0-9]+"]
+
+jobs:
+  release:
+    runs-on: debian-latest
+    strategy:
+      matrix:
+        dotnet-version: ["8.0"]
+    container: mcr.microsoft.com/dotnet/sdk:${{ matrix.dotnet-version }}
+    steps:
+      - uses: https://git.geekeey.de/actions/checkout@1
+
+      - name: nuget login
+        run: |
+          # This token is readonly and can only be used for restore
+          dotnet nuget update source geekeey --store-password-in-clear-text \
+            --username "${{ github.actor }}" --password "${{ github.token }}"
+
+      - name: dotnet pack
+        run: |
+          dotnet pack -p:ContinuousIntegrationBuild=true
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,478 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# Tye
+.tye/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.tlog
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+!**/src/packages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio 6 auto-generated project file (contains which files were open etc.)
+*.vbp
+
+# Visual Studio 6 workspace and project file (working project files containing files to include in project)
+*.dsw
+*.dsp
+
+# Visual Studio 6 technical files
+*.ncb
+*.aps
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# Visual Studio History (VSHistory) files
+.vshistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd
+
+# VS Code files for those working on multiple tools
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+# Windows Installer files from build outputs
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# JetBrains Rider
+*.sln.iml
+
+##
+## Visual studio for Mac
+##
+
+
+# globs
+Makefile.in
+*.userprefs
+*.usertasks
+config.make
+config.status
+aclocal.m4
+install-sh
+autom4te.cache/
+*.tar.gz
+tarballs/
+test-results/
+
+# Mac bundle stuff
+*.dmg
+*.app
+
+# content below from: https://github.com/github/gitignore/blob/master/Global/macOS.gitignore
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# content below from: https://github.com/github/gitignore/blob/master/Global/Windows.gitignore
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
--- a/Directory.Build.props
+++ b/Directory.Build.props
@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+  <PropertyGroup>
+    <UseArtifactsOutput>true</UseArtifactsOutput>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <VersionPrefix>1.0.0</VersionPrefix>
+    <!--<VersionSuffix></VersionSuffix>-->
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <AssemblyName>Geekeey.Extensions.$(MSBuildProjectName)</AssemblyName>
+    <RootNamespace>Geekeey.Extensions.$(MSBuildProjectName)</RootNamespace>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <Authors>The Geekeey Team</Authors>
+    <Description>A simple and lightweight result type implementation for C#.</Description>
+    <PackageTags>geekeey utility result</PackageTags>
+    <PackageReadmeFile>package-readme.md</PackageReadmeFile>
+  </PropertyGroup>
+</Project>
--- a/Directory.Build.targets
+++ b/Directory.Build.targets
@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+</Project>
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+  <PropertyGroup>
+    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.7.1" />
+    <PackageVersion Include="NUnit" Version="3.14.0" />
+    <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />
+    <PackageVersion Include="NUnit.Analyzers" Version="4.1.0" />
+    <PackageVersion Include="coverlet.collector" Version="6.0.1" />
+  </ItemGroup>
+</Project>
--- a/Geekeey.Extensions.Result.sln
+++ b/Geekeey.Extensions.Result.sln
@ -0,0 +1,30 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Result", "src\Result\Result.csproj", "{5F1B824C-659D-4A1A-B538-862788681437}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Result.Tests", "src\Result.Tests\Result.Tests.csproj", "{1DC64E48-B1AF-4426-A336-65F89AD10591}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5F1B824C-659D-4A1A-B538-862788681437}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5F1B824C-659D-4A1A-B538-862788681437}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5F1B824C-659D-4A1A-B538-862788681437}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5F1B824C-659D-4A1A-B538-862788681437}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1DC64E48-B1AF-4426-A336-65F89AD10591}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1DC64E48-B1AF-4426-A336-65F89AD10591}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1DC64E48-B1AF-4426-A336-65F89AD10591}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1DC64E48-B1AF-4426-A336-65F89AD10591}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+	EndGlobalSection
+EndGlobal
--- a/global.json
+++ b/global.json
@ -0,0 +1,9 @@
+{
+  "sdk": {
+    "version": "8.0.0",
+    "rollForward": "latestMajor",
+    "allowPrerelease": true
+  },
+  "msbuild-sdks": {
+  }
+}
--- a/nuget.config
+++ b/nuget.config
@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <config>
+    <add key="defaultPushSource" value="geekeey" />
+  </config>
+  <packageSources>
+    <clear />
+    <add key="nuget" value="https://api.nuget.org/v3/index.json" />
+    <add key="geekeey" value="https://git.geekeey.de/api/packages/geekeey/nuget/index.json" />
+  </packageSources>
+  <packageSourceMapping>
+    <packageSource key="nuget">
+      <package pattern="*" />
+    </packageSource>
+    <packageSource key="geekeey">
+      <package pattern="Geekeey.*" />
+    </packageSource>
+  </packageSourceMapping>
+</configuration>
--- a/src/Result.Tests/ErrorTests.cs
+++ b/src/Result.Tests/ErrorTests.cs
@ -0,0 +1,30 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ErrorTests
+{
+	[Test]
+	public void ImplicitConversion_FromString_ReturnsStringError()
+	{
+		Error error = "error";
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(error, Is.InstanceOf<StringError>());
+			Assert.That(error.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void ImplicitConversion_FromException_ReturnsExceptionError()
+	{
+		Error error = new CustomTestException();
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(error, Is.InstanceOf<ExceptionError>());
+			var instance = error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+}
--- a/src/Result.Tests/ExtensionsEnumerableTests.cs
+++ b/src/Result.Tests/ExtensionsEnumerableTests.cs
@ -0,0 +1,54 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ExtensionsEnumerableTests
+{
+	[Test]
+	public void Join_ReturnsAllSuccess_ForSequenceContainingAllSuccess()
+	{
+		IEnumerable<Result<int>> xs = [1, 2, 3, 4, 5];
+
+		var result = xs.Join();
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EquivalentTo(new[] { 1, 2, 3, 4, 5 }));
+		});
+	}
+
+	[Test]
+	public void Join_ReturnsFirstFailure_ForSequenceContainingFailure()
+	{
+		IEnumerable<Result<int>> xs =
+		[
+			Success(1),
+			Success(2),
+			Failure<int>("error 1"),
+			Success(4),
+			Failure<int>("error 2")
+		];
+
+		var result = xs.Join();
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error 1"));
+		});
+	}
+
+	[Test]
+	public void Join_ReturnsSuccess_ForEmptySequence()
+	{
+		IEnumerable<Result<int>> xs = [];
+
+		var result = xs.Join();
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.Empty);
+		});
+	}
+}
--- a/src/Result.Tests/Fixtures/CustomTestError.cs
+++ b/src/Result.Tests/Fixtures/CustomTestError.cs
@ -0,0 +1,7 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+internal sealed class CustomTestError : Error
+{
+	internal const string DefaultMessage = "This is a custom error for test";
+	public override string Message => DefaultMessage;
+}
--- a/src/Result.Tests/Fixtures/CustomTestException.cs
+++ b/src/Result.Tests/Fixtures/CustomTestException.cs
@ -0,0 +1,5 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+internal sealed class CustomTestException : Exception
+{
+}
--- a/src/Result.Tests/PreludeTests.cs
+++ b/src/Result.Tests/PreludeTests.cs
@ -0,0 +1,119 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class PreludeTests
+{
+	[Test]
+	public void Try_ReturnsSuccess_WithoutThrowing()
+	{
+		var result = Try(() => 2);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo(2));
+		});
+	}
+
+	[Test]
+	public void Try_ReturnsFailure_WithThrowing()
+	{
+		var result = Try<int>(() => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryAsync_ReturnsSuccess_WithoutThrowing_Task()
+	{
+		var result = await TryAsync(() => Task.FromResult(2));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo(2));
+		});
+	}
+
+	[Test]
+	public async Task TryAsync_ReturnsFailure_WithThrowing_Task()
+	{
+		var result = await TryAsync(Task<int> () => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryAsync_ReturnsFailure_WithAwaitThrowing_Task()
+	{
+		var result = await TryAsync(async Task<int> () =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryAsync_ReturnsSuccess_WithoutThrowing_ValueTask()
+	{
+		var result = await TryAsync(() => ValueTask.FromResult(2));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo(2));
+		});
+	}
+
+	[Test]
+	public async Task TryAsync_ReturnsFailure_WithThrowing_ValueTask()
+	{
+		var result = await TryAsync(ValueTask<int> () => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryAsync_ReturnsFailure_WithAwaitThrowing_ValueTask()
+	{
+		var result = await TryAsync(async ValueTask<int> () =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+}
--- a/src/Result.Tests/Result.Tests.csproj
+++ b/src/Result.Tests/Result.Tests.csproj
@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+    <Using Include="Geekeey.Extensions.Result.Prelude" Static="true" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="NUnit" />
+    <PackageReference Include="NUnit3TestAdapter" />
+    <PackageReference Include="NUnit.Analyzers" />
+    <PackageReference Include="coverlet.collector" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Result\Result.csproj" />
+  </ItemGroup>
+</Project>
--- a/src/Result.Tests/ResultConversionTests.cs
+++ b/src/Result.Tests/ResultConversionTests.cs
@ -0,0 +1,66 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ResultConversionTests
+{
+	[Test]
+	public void ImplicitConversion_FromValue_IsSuccess()
+	{
+		var result = Success(2);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.IsFailure, Is.False);
+			Assert.That(result.Value, Is.EqualTo(2));
+		});
+	}
+
+	[Test]
+	public void ImplicitConversion_FromError_IsFailure()
+	{
+		var error = new CustomTestError();
+		var result = Failure<int>(error);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.IsFailure, Is.True);
+			Assert.That(result.Error, Is.InstanceOf<CustomTestError>());
+		});
+	}
+
+	[Test]
+	public void Unwrap_ReturnsValue_ForSuccess()
+	{
+		var result = Success(2);
+		var value = result.Unwrap();
+
+		Assert.That(value, Is.EqualTo(2));
+	}
+
+	[Test]
+	public void Unwrap_Throws_ForFailure()
+	{
+		var result = Failure<int>("error");
+
+		Assert.That(() => result.Unwrap(), Throws.InstanceOf<UnwrapException>());
+	}
+
+	[Test]
+	public void ExplicitConversion_ReturnsValue_ForSuccess()
+	{
+		var result = Success(2);
+		var value = (int)result;
+
+		Assert.That(value, Is.EqualTo(2));
+	}
+
+	[Test]
+	public void ExplicitConversion_Throws_ForFailure()
+	{
+		var result = Failure<int>("error");
+
+		Assert.That(() => (int)result, Throws.InstanceOf<UnwrapException>());
+	}
+}
--- a/src/Result.Tests/ResultEqualityTests.cs
+++ b/src/Result.Tests/ResultEqualityTests.cs
@ -0,0 +1,173 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ResultEqualityTests
+{
+	[Test]
+	public void Equals_T_ReturnsTrue_ForSuccessAndEqualValue()
+	{
+		var a = Success(2);
+		var b = 2;
+
+		Assert.That(a.Equals(b), Is.True);
+	}
+
+	[Test]
+	public void Equals_T_ReturnsFalse_ForSuccessAndUnequalValue()
+	{
+		var a = Success(2);
+		var b = 3;
+
+		Assert.That(a.Equals(b), Is.False);
+	}
+
+	[Test]
+	public void Equals_T_ReturnsFalse_ForFailure()
+	{
+		var a = Failure<int>("error");
+		var b = 2;
+
+		Assert.That(a.Equals(b), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsTrue_ForSuccessAndSuccessAndEqualValue()
+	{
+		var a = Success(2);
+		var b = Success(2);
+
+		Assert.That(a.Equals(b), Is.True);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsFalse_ForSuccessAndSuccessAndUnequalValue()
+	{
+		var a = Success(2);
+		var b = Success(3);
+
+		Assert.That(a.Equals(b), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsFalse_ForSuccessAndFailure()
+	{
+		var a = Success(2);
+		var b = Failure<int>("error 1");
+
+		Assert.That(a.Equals(b), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsFalse_ForFailureAndSuccess()
+	{
+		var a = Failure<int>("error");
+		var b = Success(2);
+
+		Assert.That(a.Equals(b), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsTrue_ForFailureAndFailure()
+	{
+		var a = Failure<int>("error 1");
+		var b = Failure<int>("error 2");
+
+		Assert.That(a.Equals(b), Is.True);
+	}
+
+	[Test]
+	public void Equals_T_ReturnsTrue_ForSuccessAndEqualValue_WithComparer()
+	{
+		var a = Success(2);
+		var b = 2;
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.True);
+	}
+
+	[Test]
+	public void Equals_T_ReturnsFalse_ForSuccessAndUnequalValue_WithComparer()
+	{
+		var a = Success(2);
+		var b = 3;
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.False);
+	}
+
+	[Test]
+	public void Equals_T_ReturnsFalse_ForFailure_WithComparer()
+	{
+		var a = Failure<int>("error");
+		var b = 2;
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsTrue_ForSuccessAndSuccessAndEqualValue_WithComparer()
+	{
+		var a = Success(2);
+		var b = Success(2);
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.True);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsFalse_ForSuccessAndSuccessAndUnequalValue_WithComparer()
+	{
+		var a = Success(2);
+		var b = Success(3);
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsFalse_ForSuccessAndFailure_WithComparer()
+	{
+		var a = Success(2);
+		var b = Failure<int>("error 1");
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsFalse_ForFailureAndSuccess_WithComparer()
+	{
+		var a = Failure<int>("error");
+		var b = Success(2);
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.False);
+	}
+
+	[Test]
+	public void Equals_Result_ReturnsTrue_ForFailureAndFailure_WithComparer()
+	{
+		var a = Failure<int>("error 1");
+		var b = Failure<int>("error 2");
+
+		Assert.That(a.Equals(b, EqualityComparer<int>.Default), Is.True);
+	}
+
+	[Test]
+	public void GetHashCode_ReturnsHashCode_ForSuccess()
+	{
+		var result = Success(2);
+
+		Assert.That(result.GetHashCode(), Is.EqualTo(2.GetHashCode()));
+	}
+
+	[Test]
+	public void GetHashCode_Returns_Zero_ForNull()
+	{
+		var result = Success<string?>(null);
+
+		Assert.That(result.GetHashCode(), Is.Zero);
+	}
+
+	[Test]
+	public void GetHashCode_Returns_Zero_ForFailure()
+	{
+		var result = Failure<int>("error");
+
+		Assert.That(result.GetHashCode(), Is.Zero);
+	}
+}
--- a/src/Result.Tests/ResultMatchingTests.cs
+++ b/src/Result.Tests/ResultMatchingTests.cs
@ -0,0 +1,183 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ResultMatchingTests
+{
+	[Test]
+	public void Match_CallsSuccessFunc_ForSuccess()
+	{
+		var result = Success(2);
+		var match = result.Match(
+			v => v,
+			_ => throw new InvalidOperationException());
+
+		Assert.That(match, Is.EqualTo(2));
+	}
+
+	[Test]
+	public void Match_CallsFailureFunc_ForFailure()
+	{
+		var result = Failure<int>("error");
+		var match = result.Match(
+			_ => throw new InvalidOperationException(),
+			e => e);
+
+		Assert.That(match.Message, Is.EqualTo("error"));
+	}
+
+	[Test]
+	public void Switch_CallsSuccessAction_ForSuccess()
+	{
+		var called = false;
+
+		var result = Success(2);
+		result.Switch(
+			v =>
+			{
+				Assert.That(v, Is.EqualTo(2));
+				called = true;
+			},
+			_ => throw new InvalidOperationException()
+		);
+
+		Assert.That(called, Is.True);
+	}
+
+	[Test]
+	public void Switch_CallsFailureAction_ForFailure()
+	{
+		var called = false;
+
+		var result = Failure<int>("error");
+		result.Switch(
+			_ => throw new InvalidOperationException(),
+			e =>
+			{
+				called = true;
+				Assert.That(e.Message, Is.EqualTo("error"));
+			}
+		);
+
+		Assert.That(called, Is.True);
+	}
+
+	[Test]
+	public async Task MatchAsync_CallsSuccessFunc_ForSuccess_Task()
+	{
+		var result = Success(2);
+		var match = await result.MatchAsync(
+			Task.FromResult,
+			_ => throw new InvalidOperationException());
+
+		Assert.That(match, Is.EqualTo(2));
+	}
+
+	[Test]
+	public async Task MatchAsync_CallsFailureFunc_ForFailure_Task()
+	{
+		var result = Failure<int>("error");
+		var match = await result.MatchAsync(
+			_ => throw new InvalidOperationException(),
+			Task.FromResult);
+
+		Assert.That(match.Message, Is.EqualTo("error"));
+	}
+
+	[Test]
+	public async Task SwitchAsync_CallsSuccessAction_ForSuccess_Task()
+	{
+		var called = false;
+
+		var result = Success(2);
+		await result.SwitchAsync(
+			v =>
+			{
+				Assert.That(v, Is.EqualTo(2));
+				called = true;
+				return Task.CompletedTask;
+			},
+			_ => throw new InvalidOperationException()
+		);
+
+		Assert.That(called, Is.True);
+	}
+
+	[Test]
+	public async Task SwitchAsync_CallsFailureAction_ForFailure_Task()
+	{
+		var called = false;
+
+		var result = Failure<int>("error");
+		await result.SwitchAsync(
+			_ => throw new InvalidOperationException(),
+			e =>
+			{
+				called = true;
+				Assert.That(e.Message, Is.EqualTo("error"));
+				return Task.CompletedTask;
+			}
+		);
+
+		Assert.That(called, Is.True);
+	}
+
+	[Test]
+	public async Task MatchAsync_CallsSuccessFunc_ForSuccess_ValueTask()
+	{
+		var result = Success(2);
+		var match = await result.MatchAsync(
+			ValueTask.FromResult,
+			_ => throw new InvalidOperationException());
+
+		Assert.That(match, Is.EqualTo(2));
+	}
+
+	[Test]
+	public async Task MatchAsync_CallsFailureFunc_ForFailure_ValueTask()
+	{
+		var result = Failure<int>("error");
+		var match = await result.MatchAsync(
+			_ => throw new InvalidOperationException(),
+			ValueTask.FromResult);
+
+		Assert.That(match.Message, Is.EqualTo("error"));
+	}
+
+	[Test]
+	public async Task SwitchAsync_CallsSuccessAction_ForSuccess_ValueTask()
+	{
+		var called = false;
+
+		var result = Success(2);
+		await result.SwitchAsync(
+			v =>
+			{
+				Assert.That(v, Is.EqualTo(2));
+				called = true;
+				return ValueTask.CompletedTask;
+			},
+			_ => throw new InvalidOperationException()
+		);
+
+		Assert.That(called, Is.True);
+	}
+
+	[Test]
+	public async Task SwitchAsync_CallsFailureAction_ForFailure_ValueTask()
+	{
+		var called = false;
+
+		var result = Failure<int>("error");
+		await result.SwitchAsync(
+			_ => throw new InvalidOperationException(),
+			e =>
+			{
+				called = true;
+				Assert.That(e.Message, Is.EqualTo("error"));
+				return ValueTask.CompletedTask;
+			}
+		);
+
+		Assert.That(called, Is.True);
+	}
+}
--- a/src/Result.Tests/ResultTests.cs
+++ b/src/Result.Tests/ResultTests.cs
@ -0,0 +1,63 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ResultTests
+{
+	[Test]
+	public void New_T_HasValue()
+	{
+		var result = new Result<int>(1);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.IsFailure, Is.False);
+			Assert.That(result.Value, Is.Not.EqualTo(default(int)));
+			Assert.That(result.Error, Is.Null);
+		});
+	}
+
+	[Test]
+	public void New_Error_HasError()
+	{
+		var result = new Result<int>(new CustomTestError());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.IsFailure, Is.True);
+			Assert.That(result.Value, Is.EqualTo(default(int)));
+			Assert.That(result.Error, Is.InstanceOf<CustomTestError>());
+		});
+	}
+
+	[Test]
+	public void Default_IsDefault()
+	{
+		var result = default(Result<int>);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.IsFailure, Is.True);
+			Assert.That(result.Value, Is.EqualTo(default(int)));
+			Assert.That(result.Error, Is.EqualTo(Error.DefaultValueError));
+		});
+	}
+
+	[Test]
+	public void ToString_ReturnsSuccessString()
+	{
+		Result<int> result = 2;
+
+		Assert.That(result.ToString(), Is.EqualTo("Success { 2 }"));
+	}
+
+	[Test]
+	public void ToString_ReturnsFailureString()
+	{
+		Result<int> result = new StringError("error");
+
+		Assert.That(result.ToString(), Is.EqualTo("Failure { error }"));
+	}
+}
--- a/src/Result.Tests/ResultTransformTests.cs
+++ b/src/Result.Tests/ResultTransformTests.cs
@ -0,0 +1,756 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ResultTransformTests
+{
+	[Test]
+	public void Map_ReturnsSuccess_ForSuccess()
+	{
+		var start = Success(2);
+		var result = start.Map(value => value.ToString());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public void Map_ReturnsFailure_ForFailure()
+	{
+		var start = Failure<int>("error");
+		var result = start.Map(value => value.ToString());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void Then_ReturnsSuccess_ForSuccessAndMappingReturningSuccess()
+	{
+		var start = Success(2);
+		var result = start.Then(value => Success(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public void Then_ReturnsFailure_ForSuccessAndMappingReturningFailure()
+	{
+		var start = Success(2);
+		var result = start.Then(_ => Failure<string>("error"));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void Then_ReturnsFailure_ForFailureAndMappingReturningSuccess()
+	{
+		var start = Failure<int>("error");
+		var result = start.Then(value => Success(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void Then_ReturnsFailure_ForFailureAndMappingReturningFailure()
+	{
+		var start = Failure<int>("error");
+		var result = start.Then(_ => Failure<int>("error 2"));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void TryMap_ReturnsSuccess_ForSuccessWithoutThrowing()
+	{
+		var start = Success(2);
+		var result = start.TryMap(value => value.ToString());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public void TryMap_ReturnsFailure_ForFailureWithoutThrowing()
+	{
+		var start = Failure<int>("error");
+		var result = start.TryMap(value => value.ToString());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void TryMap_ReturnsFailure_ForSuccessWithThrowing()
+	{
+		var start = Success(2);
+		var result = start.TryMap<string>(_ => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public void TryMap_ReturnsFailure_ForFailureWithThrowing()
+	{
+		var start = Failure<int>("error");
+		var result = start.TryMap<string>(_ => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void ThenTry_ReturnsSuccess_ForSuccessAndMappingReturningSuccess()
+	{
+		var start = Success(2);
+		var result = start.ThenTry(value => Success(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public void ThenTry_ReturnsFailure_ForSuccessAndMappingReturningFailure()
+	{
+		var start = Success(2);
+		var result = start.ThenTry(_ => Failure<string>("error"));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void ThenTry_ReturnsFailure_ForFailureAndMappingReturningFailure()
+	{
+		var start = Failure<int>("error");
+		var result = start.ThenTry(x => Success(x.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void ThenTry_ReturnsFailure_ForSuccessAndMappingThrowing()
+	{
+		var start = Success(2);
+		var result = start.ThenTry<string>(_ => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public void ThenTry_ReturnsFailure_ForFailureAndMappingThrowing()
+	{
+		var start = Failure<int>("error");
+		var result = start.ThenTry<string>(_ => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task MapAsync_ReturnsSuccess_ForSuccess_Task()
+	{
+		var start = Success(2);
+		var result = await start.MapAsync(value => Task.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task MapAsync_ReturnsFailure_ForFailure_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.MapAsync(value => Task.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsSuccess_ForSuccessAndMappingReturningSuccess_Task()
+	{
+		var start = Success(2);
+		var result = await start.ThenAsync(value => Task.FromResult(Success(value.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsFailure_ForSuccessAndMappingReturningFailure_Task()
+	{
+		var start = Success(2);
+		var result = await start.ThenAsync(_ => Task.FromResult(Failure<string>("error")));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsFailure_ForFailureAndMappingReturningSuccess_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenAsync(value => Task.FromResult(Success(value.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsFailure_ForFailureAndMappingReturningFailure_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenAsync(_ => Task.FromResult(Failure<int>("error 2")));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsSuccess_ForSuccessWithoutThrowing_Task()
+	{
+		var start = Success(2);
+		var result = await start.TryMapAsync(value => Task.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForFailureWithoutThrowing_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.TryMapAsync(value => Task.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForSuccessWithThrowing_Task()
+	{
+		var start = Success(2);
+		var result = await start.TryMapAsync(Task<string> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForSuccessWithAwaitThrowing_Task()
+	{
+		var start = Success(2);
+		var result = await start.TryMapAsync(async Task<string> (_) =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForFailureWithThrowing_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.TryMapAsync(Task<string> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForFailureWithAwaitThrowing_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.TryMapAsync(async Task<string> (_) =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsSuccess_ForSuccessAndMappingReturningSuccess_Task()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(value => Task.FromResult(Success(value.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForSuccessAndMappingReturningFailure_Task()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(_ => Task.FromResult(Failure<string>("error")));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForFailureAndMappingReturningFailure_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenTryAsync(x => Task.FromResult(Success(x.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForSuccessAndMappingThrowing_Task()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(Task<Result<string>> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForSuccessAndMappingAwaitThrowing_Task()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(async Task<Result<string>> (_) =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForFailureAndMappingThrowing_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenTryAsync(Task<Result<string>> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForFailureAndMappingAwaitThrowing_Task()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenTryAsync(async Task<Result<string>> (_) =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task MapAsync_ReturnsSuccess_ForSuccess_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.MapAsync(value => ValueTask.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task MapAsync_ReturnsFailure_ForFailure_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.MapAsync(value => ValueTask.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsSuccess_ForSuccessAndMappingReturningSuccess_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.ThenAsync(value => ValueTask.FromResult(Success(value.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsFailure_ForSuccessAndMappingReturningFailure_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.ThenAsync(_ => ValueTask.FromResult(Failure<string>("error")));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsFailure_ForFailureAndMappingReturningSuccess_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenAsync(value => ValueTask.FromResult(Success(value.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenAsync_ReturnsFailure_ForFailureAndMappingReturningFailure_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenAsync(_ => ValueTask.FromResult(Failure<int>("error 2")));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsSuccess_ForSuccessWithoutThrowing_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.TryMapAsync(value => ValueTask.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForFailureWithoutThrowing_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.TryMapAsync(value => ValueTask.FromResult(value.ToString()));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForSuccessWithThrowing_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.TryMapAsync(ValueTask<string> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForSuccessWithAwaitThrowing_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.TryMapAsync(async ValueTask<string> (_) =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForFailureWithThrowing_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.TryMapAsync(ValueTask<string> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task TryMapAsync_ReturnsFailure_ForFailureWithAwaitThrowing_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.TryMapAsync(async ValueTask<string> (_) =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsSuccess_ForSuccessAndMappingReturningSuccess_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(value => ValueTask.FromResult(Success(value.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.True);
+			Assert.That(result.Value, Is.EqualTo("2"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForSuccessAndMappingReturningFailure_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(_ => ValueTask.FromResult(Failure<string>("error")));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForFailureAndMappingReturningFailure_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenTryAsync(x => ValueTask.FromResult(Success(x.ToString())));
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForSuccessAndMappingThrowing_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(ValueTask<Result<string>> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForSuccessAndMappingAwaitThrowing_ValueTask()
+	{
+		var start = Success(2);
+		var result = await start.ThenTryAsync(async ValueTask<Result<string>> (_) =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<ExceptionError>());
+			var instance = result.Error as ExceptionError;
+			Assert.That(instance?.Exception, Is.InstanceOf<CustomTestException>());
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForFailureAndMappingThrowing_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenTryAsync(ValueTask<Result<string>> (_) => throw new CustomTestException());
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public async Task ThenTryAsync_ReturnsFailure_ForFailureAndMappingAwaitThrowing_ValueTask()
+	{
+		var start = Failure<int>("error");
+		var result = await start.ThenTryAsync(async ValueTask<Result<string>> (_) =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(result.IsSuccess, Is.False);
+			Assert.That(result.Error, Is.InstanceOf<StringError>());
+			Assert.That(result.Error?.Message, Is.EqualTo("error"));
+		});
+	}
+}
--- a/src/Result.Tests/ResultUnboxTests.cs
+++ b/src/Result.Tests/ResultUnboxTests.cs
@ -0,0 +1,113 @@
+namespace Geekeey.Extensions.Result.Tests;
+
+[TestFixture]
+internal sealed class ResultUnboxTests
+{
+	[Test]
+	public void TryGetValue_1_ReturnsTrueAndSetsValue_ForSuccess()
+	{
+		var result = Success(2);
+		var ok = result.TryGetValue(out var value);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.True);
+			Assert.That(value, Is.EqualTo(2));
+		});
+	}
+
+	[Test]
+	public void TryGetValue_1_ReturnsFalse_ForFailure()
+	{
+		var result = Failure<int>("error");
+		var ok = result.TryGetValue(out var value);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.False);
+			Assert.That(value, Is.EqualTo(default(int)));
+		});
+	}
+
+	[Test]
+	public void TryGetValue_2_ReturnsTrueAndSetsValue_ForSuccess()
+	{
+		var result = Success(2);
+		var ok = result.TryGetValue(out var value, out var error);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.True);
+			Assert.That(value, Is.EqualTo(2));
+			Assert.That(error, Is.EqualTo(default(Error)));
+		});
+	}
+
+	[Test]
+	public void TryGetValue_2_ReturnsFalseAndSetsError_ForFailure()
+	{
+		var result = Failure<int>("error");
+		var ok = result.TryGetValue(out var value, out var error);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.False);
+			Assert.That(value, Is.EqualTo(default(int)));
+			Assert.That(error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void TryGetError_1_ReturnsTrueAndSetsError_ForFailure()
+	{
+		var result = Failure<int>("error");
+		var ok = result.TryGetError(out var error);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.True);
+			Assert.That(error?.Message, Is.EqualTo("error"));
+		});
+	}
+
+	[Test]
+	public void TryGetError_1_ReturnsFalse_ForSuccess()
+	{
+		var result = Success(2);
+		var ok = result.TryGetError(out var error);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.False);
+			Assert.That(error, Is.EqualTo(default(Error)));
+		});
+	}
+
+	[Test]
+	public void TryGetError_2_ReturnsTrueAndSetsError_ForFailure()
+	{
+		var r = Failure<int>("error");
+		var ok = r.TryGetError(out var error, out var value);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.True);
+			Assert.That(error?.Message, Is.EqualTo("error"));
+			Assert.That(value, Is.EqualTo(default(int)));
+		});
+	}
+
+	[Test]
+	public void TryGetError_2_ReturnsFalseAndSetsValue_ForSuccess()
+	{
+		var r = Success(2);
+		var ok = r.TryGetError(out var error, out var value);
+
+		Assert.Multiple(() =>
+		{
+			Assert.That(ok, Is.False);
+			Assert.That(error, Is.EqualTo(default(Error)));
+			Assert.That(value, Is.EqualTo(2));
+		});
+	}
+}
--- a/src/Result/Errors/AggregateError.cs
+++ b/src/Result/Errors/AggregateError.cs
@ -0,0 +1,16 @@
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// An error which is a combination of other errors.
+/// </summary>
+/// <param name="errors">The errors the error consists of.</param>
+public sealed class AggregateError(IEnumerable<Error> errors) : Error
+{
+	/// <summary>
+	/// The errors the error consists of.
+	/// </summary>
+	public IReadOnlyCollection<Error> Errors { get; } = errors.ToList();
+
+	/// <inheritdoc/>
+	public override string Message => string.Join(Environment.NewLine, Errors.Select(error => error.Message));
+}
--- a/src/Result/Errors/Error.cs
+++ b/src/Result/Errors/Error.cs
@ -0,0 +1,44 @@
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// An error containing a simple message. Makes up the other half of a <see cref="Result{T}"/> which might be an error.
+/// </summary>
+/// <remarks>
+/// An error is conceptually very similar to an exception but without the ability to be thrown, meant to be a more
+/// lightweight type meant to be wrapped in a <see cref="Result{T}"/>.
+/// An error fundamentally only contains a single string message, however other more concrete types such as
+/// <see cref="ExceptionError"/> or <see cref="AggregateError"/> may define other properties.
+/// Errors are meant to be small, specific, and descriptive, such that they are easy to match over and provide specific
+/// handling for specific kinds of errors.
+/// </remarks>
+public abstract class Error
+{
+	/// <summary>
+	/// A statically accessible default "Result has no value." error.
+	/// </summary>
+	internal static Error DefaultValueError { get; } = new StringError("The result has no value.");
+
+	/// <summary>
+	/// The message used to display the error.
+	/// </summary>
+	public abstract string Message { get; }
+
+	/// <summary>
+	/// Gets a string representation of the error. Returns <see cref="Message"/> by default.
+	/// </summary>
+	public override string ToString() => Message;
+
+	/// <summary>
+	/// Implicitly converts a string into a <see cref="StringError"/>.
+	/// </summary>
+	/// <param name="message">The message of the error.</param>
+	public static implicit operator Error(string message)
+		=> new StringError(message);
+
+	/// <summary>
+	/// Implicitly converts an exception into an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="exception">The exception to convert.</param>
+	public static implicit operator Error(Exception exception)
+		=> new ExceptionError(exception);
+}
--- a/src/Result/Errors/ExceptionError.cs
+++ b/src/Result/Errors/ExceptionError.cs
@ -0,0 +1,18 @@
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// An error which is constructed from an exception.
+/// </summary>
+/// <param name="exception">The exception in the error.</param>
+public sealed class ExceptionError(Exception exception) : Error
+{
+	/// <summary>
+	/// The exception in the error.
+	/// </summary>
+	public Exception Exception { get; } = exception;
+
+	/// <summary>
+	/// The exception in the error.
+	/// </summary>
+	public override string Message => Exception.Message;
+}
--- a/src/Result/Errors/StringError.cs
+++ b/src/Result/Errors/StringError.cs
@ -0,0 +1,11 @@
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// An error which displays a simple string.
+/// </summary>
+/// <param name="message">The message to display.</param>
+public sealed class StringError(string message) : Error
+{
+	/// <inheritdoc/>
+	public override string Message => message;
+}
--- a/src/Result/Exceptions/UnwrapException.cs
+++ b/src/Result/Exceptions/UnwrapException.cs
@ -0,0 +1,18 @@
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// The exception is thrown when an <see cref="Result{T}"/> is attempted to be unwrapped contains only a failure value.
+/// </summary>
+public sealed class UnwrapException : Exception
+{
+	/// <summary>
+	/// Creates a new <see cref="UnwrapException"/>.
+	/// </summary>
+	public UnwrapException() : base("Cannot unwrap result because it does not have a value.") { }
+
+	/// <summary>
+	/// Creates a new <see cref="UnwrapException"/>.
+	/// </summary>
+	/// <param name="error">An error message.</param>
+	public UnwrapException(string error) : base(error) { }
+}
--- a/src/Result/Extensions/Extensions.Enumerable.cs
+++ b/src/Result/Extensions/Extensions.Enumerable.cs
@ -0,0 +1,37 @@
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// Extensions for or relating to <see cref="Result{T}"/>.
+/// </summary>
+public static partial class Extensions
+{
+	/// <summary>
+	/// Turns a sequence of results into a single result containing the success values in the results only if all the
+	/// results have success values.
+	/// </summary>
+	/// <param name="results">The results to turn into a single sequence.</param>
+	/// <typeparam name="T">The type of the success values in the results.</typeparam>
+	/// <returns>A single result containing a sequence of all the success values from the original sequence of results,
+	/// or the first failure value encountered within the sequence.</returns>
+	/// <remarks>
+	/// This method completely enumerates the input sequence before returning and is not lazy. As a consequence of this,
+	/// the sequence within the returned result is an <see cref="IReadOnlyList{T}"/>.
+	/// </remarks>
+	public static Result<IReadOnlyList<T>> Join<T>(this IEnumerable<Result<T>> results)
+	{
+		_ = results.TryGetNonEnumeratedCount(out var count);
+		var list = new List<T>(count);
+
+		foreach (var result in results)
+		{
+			if (!result.TryGetValue(out var value, out var error))
+			{
+				return new Result<IReadOnlyList<T>>(error);
+			}
+
+			list.Add(value);
+		}
+
+		return list;
+	}
+}
--- a/src/Result/Extensions/Extensions.Task.cs
+++ b/src/Result/Extensions/Extensions.Task.cs
@ -0,0 +1,85 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// Extensions for or relating to <see cref="Result{T}"/>.
+/// </summary>
+[ExcludeFromCodeCoverage]
+public static partial class Extensions
+{
+	#region Task<Result<T>>
+
+	/// <summary>
+	/// Maps the success value of the result object of the completed task using a mapping function, or does nothing if
+	/// the result object of the completed task is a failure.
+	/// </summary>
+	/// <param name="result">A task object retunring a result object when completing.</param>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="T">The type of the object inside the result returned by the task.</typeparam>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A new result containing either the mapped success value or the failure value of the original
+	/// result.</returns>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> Map<T, TNew>(this Task<Result<T>> result,
+		Func<T, TNew> func)
+		=> (await result).Map(func);
+
+	/// <inheritdoc cref="Map{T,TNew}(System.Threading.Tasks.Task{Geekeey.Extensions.Result.Result{T}},System.Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> Map<T, TNew>(this Task<Result<T>> result,
+		Func<T, ValueTask<TNew>> func)
+		=> await (await result).MapAsync(func);
+
+	/// <summary>
+	/// Maps the success value of the result object of the completed task to a new result using a mapping function, or
+	/// does nothing if the result object of the completed task is a failure.
+	/// </summary>
+	/// <param name="result">A task object retunring a result object when completing.</param>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="T">The type of the object inside the result returned by the task.</typeparam>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A new result containing either the mapped success value or the failure value of the original
+	/// result.</returns>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> Then<T, TNew>(this Task<Result<T>> result,
+		Func<T, Result<TNew>> func)
+		=> (await result).Then(func);
+
+	/// <inheritdoc cref="Then{T,TNew}(System.Threading.Tasks.Task{Geekeey.Extensions.Result.Result{T}},System.Func{T,Geekeey.Extensions.Result.Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> Then<T, TNew>(this Task<Result<T>> result,
+		Func<T, ValueTask<Result<TNew>>> func)
+		=> await (await result).ThenAsync(func);
+
+	#endregion
+
+	#region ValueTask<Result<T>>
+
+	/// <inheritdoc cref="Map{T,TNew}(System.Threading.Tasks.Task{Geekeey.Extensions.Result.Result{T}},System.Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> Map<T, TNew>(this ValueTask<Result<T>> result,
+		Func<T, TNew> func)
+		=> (await result).Map(func);
+
+	/// <inheritdoc cref="Map{T,TNew}(System.Threading.Tasks.Task{Geekeey.Extensions.Result.Result{T}},System.Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> Map<T, TNew>(this ValueTask<Result<T>> result,
+		Func<T, ValueTask<TNew>> func)
+		=> await (await result).MapAsync(func);
+
+	/// <inheritdoc cref="Then{T,TNew}(System.Threading.Tasks.Task{Geekeey.Extensions.Result.Result{T}},System.Func{T,Geekeey.Extensions.Result.Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> Then<T, TNew>(this ValueTask<Result<T>> result,
+		Func<T, Result<TNew>> func)
+		=> (await result).Then(func);
+
+	/// <inheritdoc cref="Then{T,TNew}(System.Threading.Tasks.Task{Geekeey.Extensions.Result.Result{T}},System.Func{T,Geekeey.Extensions.Result.Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> Then<T, TNew>(this ValueTask<Result<T>> result,
+		Func<T, ValueTask<Result<TNew>>> func)
+		=> await (await result).ThenAsync(func);
+
+	#endregion
+}
--- a/src/Result/Prelude.cs
+++ b/src/Result/Prelude.cs
@ -0,0 +1,92 @@
+using System.Diagnostics.Contracts;
+
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// A class containing various utility methods, a 'prelude' to the rest of the library.
+/// </summary>
+/// <remarks>
+/// This class is meant to be imported statically, e.g. <c>using static Geekeey.Extensions.Result.Prelude;</c>.
+/// Recommended to be imported globally via a global using statement.
+/// </remarks>
+public static class Prelude
+{
+	/// <summary>
+	/// Creates a result containing an success value.
+	/// </summary>
+	/// <typeparam name="T">The type of the success value.</typeparam>
+	/// <param name="value">The success value to create the result from.</param>
+	[Pure]
+	public static Result<T> Success<T>(T value) => new(value);
+
+	/// <summary>
+	/// Creates a result containing a failure value.
+	/// </summary>
+	/// <typeparam name="T">The type of an success value in the result.</typeparam>
+	/// <param name="error">The failure value to create the result from.</param>
+	[Pure]
+	public static Result<T> Failure<T>(Error error) => new(error);
+
+	/// <summary>
+	/// Tries to execute a function and return the result. If the function throws an exception, the exception will be
+	/// returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <typeparam name="T">The type the function returns.</typeparam>
+	/// <param name="function">The function to try execute.</param>
+	/// <returns>A result containing the return value of the function or an <see cref="ExceptionError"/> containing the
+	/// exception thrown by the function.</returns>
+	[Pure]
+	public static Result<T> Try<T>(Func<T> function)
+	{
+		try
+		{
+			return new Result<T>(function());
+		}
+		catch (Exception exception)
+		{
+			return new Result<T>(new ExceptionError(exception));
+		}
+	}
+
+	/// <summary>
+	/// Tries to execute an asynchronous function and return the result. If the function throws an exception, the
+	/// exception will be returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <typeparam name="T">The type the function returns.</typeparam>
+	/// <param name="function">The function to try execute.</param>
+	/// <returns>A result containing the return value of the function or an <see cref="ExceptionError"/> containing the
+	/// exception thrown by the function.</returns>
+	[Pure]
+	public static async ValueTask<Result<T>> TryAsync<T>(Func<ValueTask<T>> function)
+	{
+		try
+		{
+			return new Result<T>(await function());
+		}
+		catch (Exception exception)
+		{
+			return new Result<T>(new ExceptionError(exception));
+		}
+	}
+
+	/// <summary>
+	/// Tries to execute an asynchronous function and return the result. If the function throws an exception, the
+	/// exception will be returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <typeparam name="T">The type the function returns.</typeparam>
+	/// <param name="function">The function to try execute.</param>
+	/// <returns>A result containing the return value of the function or an <see cref="ExceptionError"/> containing the
+	/// exception thrown by the function.</returns>
+	[Pure]
+	public static async Task<Result<T>> TryAsync<T>(Func<Task<T>> function)
+	{
+		try
+		{
+			return new Result<T>(await function());
+		}
+		catch (Exception exception)
+		{
+			return new Result<T>(new ExceptionError(exception));
+		}
+	}
+}
--- a/src/Result/Project.props
+++ b/src/Result/Project.props
@ -0,0 +1,5 @@
+<Project>
+  <ItemGroup Condition="'$(ImplicitUsings)' == 'enable'">
+    <Using Include="Geekeey.Extensions.Result.Prelude" Static="true" />
+  </ItemGroup>
+</Project>
--- a/src/Result/Result.Conversion.cs
+++ b/src/Result/Result.Conversion.cs
@ -0,0 +1,36 @@
+using System.Diagnostics.Contracts;
+
+namespace Geekeey.Extensions.Result;
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Implicitly constructs a result from a success value.
+	/// </summary>
+	/// <param name="value">The value to construct the result from.</param>
+	[Pure]
+	public static implicit operator Result<T>(T value) => new(value);
+
+	/// <summary>
+	/// Implicitly constructs a result from a failure value.
+	/// </summary>
+	/// <param name="error">The error to construct the result from.</param>
+	[Pure]
+	public static implicit operator Result<T>(Error error) => new(error);
+
+	/// <summary>
+	/// Unwraps the success value of the result. Throws an <see cref="UnwrapException"/> if the result is a failure.
+	/// </summary>
+	/// <remarks>
+	/// This call is <b>unsafe</b> in the sense that it might intentionally throw an exception. Please only use this
+	/// call if the caller knows that this operation is safe, or that an exception is acceptable to be thrown.
+	/// </remarks>
+	/// <returns>The success value of the result.</returns>
+	/// <exception cref="UnwrapException">The result is not a success.</exception>
+	[Pure]
+	public T Unwrap() => IsSuccess ? Value! : throw new UnwrapException();
+
+	/// <inheritdoc cref="Unwrap"/>
+	[Pure]
+	public static explicit operator T(Result<T> result) => result.Unwrap();
+}
--- a/src/Result/Result.Equality.cs
+++ b/src/Result/Result.Equality.cs
@ -0,0 +1,115 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.Contracts;
+using System.Numerics;
+
+namespace Geekeey.Extensions.Result;
+
+public readonly partial struct Result<T> : IEquatable<Result<T>>, IEquatable<T>,
+	IEqualityOperators<Result<T>, Result<T>, bool>, IEqualityOperators<Result<T>, T, bool>
+{
+	/// <summary>
+	/// Checks whether the result is equal to another result. Results are equal if both results are success values and
+	/// the success values are equal, or if both results are failures.
+	/// </summary>
+	/// <param name="other">The result to check for equality with the current result.</param>
+	[Pure]
+	public bool Equals(Result<T> other)
+		=> Equals(this, other, EqualityComparer<T>.Default);
+
+	/// <summary>
+	/// Checks whether the result is equal to another result. Results are equal if both results are success values and
+	/// the success values are equal, or if both results are failures.
+	/// </summary>
+	/// <param name="other">The result to check for equality with the current result.</param>
+	/// <param name="comparer">The equality comparer to use for comparing values.</param>
+	[Pure]
+	public bool Equals(Result<T> other, IEqualityComparer<T> comparer)
+		=> Equals(this, other, comparer);
+
+	/// <summary>
+	/// Checks whether the result is a success value and the success value is equal to another value.
+	/// </summary>
+	/// <param name="other">The value to check for equality with the success value of the result.</param>
+	[Pure]
+	public bool Equals(T? other)
+		=> Equals(this, other, EqualityComparer<T>.Default);
+
+	/// <summary>
+	/// Checks whether the result is a success value and the success value is equal to another value using a specified
+	/// equality comparer.
+	/// </summary>
+	/// <param name="other">The value to check for equality with the success value of the result.</param>
+	/// <param name="comparer">The equality comparer to use for comparing values.</param>
+	[Pure]
+	public bool Equals(T? other, IEqualityComparer<T> comparer)
+		=> Equals(this, other, comparer);
+
+	/// <inheritdoc/>
+	[Pure]
+	public override bool Equals(object? other)
+		=> other is T x && Equals(x) || other is Result<T> r && Equals(r);
+
+	/// <inheritdoc/>
+	[Pure]
+	public override int GetHashCode()
+		=> GetHashCode(this, EqualityComparer<T>.Default);
+
+	internal static bool Equals(Result<T> a, Result<T> b, IEqualityComparer<T> comparer)
+	{
+		if (!a._success || !b._success) return !a._success && !b._success;
+		if (a.Value is null || b.Value is null) return a.Value is null && b.Value is null;
+		return comparer.Equals(a.Value, b.Value);
+	}
+
+	internal static bool Equals(Result<T> a, T? b, IEqualityComparer<T> comparer)
+	{
+		if (!a._success) return false;
+		if (a.Value is null || b is null) return a.Value is null && b is null;
+		return comparer.Equals(a.Value, b);
+	}
+
+	internal static int GetHashCode(Result<T> result, IEqualityComparer<T> comparer)
+	{
+		if (result is { _success: true, Value: not null })
+			return comparer.GetHashCode(result.Value);
+		return 0;
+	}
+
+	/// <summary>
+	/// Checks whether two results are equal. Results are equal if both results are success values and the success
+	/// values are equal, or if both results are failures.
+	/// </summary>
+	/// <param name="a">The first result to compare.</param>
+	/// <param name="b">The second result to compare.</param>
+	[Pure]
+	[ExcludeFromCodeCoverage]
+	public static bool operator ==(Result<T> a, Result<T> b) => a.Equals(b);
+
+	/// <summary>
+	/// Checks whether two results are not equal. Results are equal if both results are success values and the success
+	/// values are equal, or if both results are failures.
+	/// </summary>
+	/// <param name="a">The first result to compare.</param>
+	/// <param name="b">The second result to compare.</param>
+	[Pure]
+	[ExcludeFromCodeCoverage]
+	public static bool operator !=(Result<T> a, Result<T> b) => !a.Equals(b);
+
+	/// <summary>
+	/// Checks whether a result is a success value and the success value is equal to another value.
+	/// </summary>
+	/// <param name="a">The result to compare.</param>
+	/// <param name="b">The value to check for equality with the success value in the result.</param>
+	[Pure]
+	[ExcludeFromCodeCoverage]
+	public static bool operator ==(Result<T> a, T? b) => a.Equals(b);
+
+	/// <summary>
+	/// Checks whether a result either does not have a value, or the value is not equal to another value.
+	/// </summary>
+	/// <param name="a">The result to compare.</param>
+	/// <param name="b">The value to check for inequality with the success value in the result.</param>
+	[Pure]
+	[ExcludeFromCodeCoverage]
+	public static bool operator !=(Result<T> a, T? b) => !a.Equals(b);
+}
--- a/src/Result/Result.Matching.cs
+++ b/src/Result/Result.Matching.cs
@ -0,0 +1,91 @@
+using System.Diagnostics.Contracts;
+
+namespace Geekeey.Extensions.Result;
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Matches over the success value or failure value of the result and returns another value. Can be conceptualized
+	/// as an exhaustive <c>switch</c> expression matching all possible values of the type.
+	/// </summary>
+	/// <typeparam name="TResult">The type to return from the match.</typeparam>
+	/// <param name="success">The function to apply to the success value of the result if the result is a success.</param>
+	/// <param name="failure">The function to apply to the failure value of the result if the result is a failure.</param>
+	/// <returns>The result of applying either <paramref name="success"/> or <paramref name="failure"/> on the success
+	/// value or failure value of the result.</returns>
+	[Pure]
+	public TResult Match<TResult>(Func<T, TResult> success, Func<Error, TResult> failure)
+		=> _success ? success(Value!) : failure(Error!);
+
+	/// <summary>
+	/// Matches over the success value or failure value of the result and invokes an effectful action onto the success
+	/// value or failure value. Can be conceptualized as an exhaustive <c>switch</c> statement matching all possible
+	/// values of the type.
+	/// </summary>
+	/// <param name="success">The function to call with the success value of the result if the result is a success.</param>
+	/// <param name="failure">The function to call with the failure value of the result if the result is a failure.</param>
+	public void Switch(Action<T> success, Action<Error> failure)
+	{
+		if (_success) success(Value!);
+		else failure(Error!);
+	}
+}
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Asynchronously matches over the success value or failure value of the result and returns another value. Can be
+	/// conceptualized as an exhaustive <c>switch</c> expression matching all possible values of the type.
+	/// </summary>
+	/// <typeparam name="TResult">The type to return from the match.</typeparam>
+	/// <param name="success">The function to apply to the success value of the result if the result is a success.</param>
+	/// <param name="failure">The function to apply to the failure value of the result if the result is a failure.</param>
+	/// <returns>A task completing with the result of applying either <paramref name="success"/> or
+	/// <paramref name="failure"/> on the success value or failure value of the result.</returns>
+	[Pure]
+	public async ValueTask<TResult> MatchAsync<TResult>(Func<T, ValueTask<TResult>> success, Func<Error, ValueTask<TResult>> failure)
+		=> _success ? await success(Value!) : await failure(Error!);
+
+	/// <summary>
+	/// Asynchronously matches over the success value or failure value of the result and invokes an effectful action
+	/// onto the success value or the failure value. Can be conceptualized as an exhaustive <c>switch</c> statement
+	/// matching all possible values of the type.
+	/// </summary>
+	/// <param name="success">The function to call with the success value of the result if the result is a success.</param>
+	/// <param name="failure">The function to call with the failure value of the result if the result is a failure.</param>
+	public async ValueTask SwitchAsync(Func<T, ValueTask> success, Func<Error, ValueTask> failure)
+	{
+		if (_success) await success(Value!);
+		else await failure(Error!);
+	}
+}
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Asynchronously matches over the success value or failure value of the result and returns another value. Can be
+	/// conceptualized as an exhaustive <c>switch</c> expression matching all possible values of the type.
+	/// </summary>
+	/// <typeparam name="TResult">The type to return from the match.</typeparam>
+	/// <param name="success">The function to apply to the success value of the result if the result is a success.</param>
+	/// <param name="failure">The function to apply to the failure value of the result if the result is a failure.</param>
+	/// <returns>A task completing with the result of applying either <paramref name="success"/> or
+	/// <paramref name="failure"/> on the success value or failure value of the result.</returns>
+	[Pure]
+	public async Task<TResult> MatchAsync<TResult>(Func<T, Task<TResult>> success, Func<Error, Task<TResult>> failure)
+		=> _success ? await success(Value!) : await failure(Error!);
+
+	/// <summary>
+	/// Asynchronously matches over the success value or failure value of the result and invokes an effectful action
+	/// onto the success value or failure value. Can be conceptualized as an exhaustive <c>switch</c> statement matching
+	/// all possible values of
+	/// the type.
+	/// </summary>
+	/// <param name="success">The function to call with the success value of the result if the result is a success.</param>
+	/// <param name="failure">The function to call with the failure value of the result if the result is a failure.</param>
+	public async Task SwitchAsync(Func<T, Task> success, Func<Error, Task> failure)
+	{
+		if (_success) await success(Value!);
+		else await failure(Error!);
+	}
+}
--- a/src/Result/Result.Transform.cs
+++ b/src/Result/Result.Transform.cs
@ -0,0 +1,335 @@
+using System.Diagnostics.Contracts;
+
+namespace Geekeey.Extensions.Result;
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Maps the success value of the result using a mapping function, or does nothing if the result is a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A new result containing either the mapped success value or the failure value of the original
+	/// result.</returns>
+	[Pure]
+	public Result<TNew> Map<TNew>(Func<T, TNew> func)
+		=> _success ? new Result<TNew>(func(Value!)) : new Result<TNew>(Error!);
+
+	/// <summary>
+	/// Tries to map the success value of the result using a mapping function, or does nothing if the result is a
+	/// failure. If the mapping function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A new result containing either the mapped value, the exception thrown by <paramref name="func"/>
+	/// wrapped in an <see cref="ExceptionError"/>, or the failure value of the original result.</returns>
+	[Pure]
+	public Result<TNew> TryMap<TNew>(Func<T, TNew> func)
+	{
+		try
+		{
+			return Map(func);
+		}
+		catch (Exception exception)
+		{
+			return new Result<TNew>(new ExceptionError(exception));
+		}
+	}
+
+	/// <summary>
+	/// Maps the success value of the result to a new result using a mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success value to a new result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A result which is either the mapped result or a new result containing the failure value of the original
+	/// result.</returns>
+	[Pure]
+	public Result<TNew> Then<TNew>(Func<T, Result<TNew>> func)
+		=> _success ? func(Value!) : new Result<TNew>(Error!);
+
+	/// <summary>
+	/// Tries to map the success value of the result to a new result using a mapping function, or does nothing if the result
+	/// is a failure. If the mapping function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success value to a new result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A result which is either the mapped result, the exception thrown by <paramref name="func"/> wrapped in
+	/// an <see cref="ExceptionError"/>, or a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Result<TNew> ThenTry<TNew>(Func<T, Result<TNew>> func)
+	{
+		try
+		{
+			return Then(func);
+		}
+		catch (Exception exception)
+		{
+			return new Result<TNew>(new ExceptionError(exception));
+		}
+	}
+}
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Maps the success value of the result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result and constructing a new result containing the mapped value, or completes
+	/// synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> MapAsync<TNew>(Func<T, ValueTask<TNew>> func)
+	{
+		if (!_success) return ValueTask.FromResult(new Result<TNew>(Error!));
+
+		var task = func(Value!);
+		return CreateResult(task);
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<TNew> task)
+		{
+			var value = await task;
+			return new Result<TNew>(value);
+		}
+	}
+
+	/// <summary>
+	/// Maps the success value of the result using an asynchronous mapping function, or does nothing if the result is a
+	/// failure. If the mapping function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result and constructing a new result containing the mapped value, returning any exception
+	/// thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/> or completes synchronously by
+	/// returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> TryMapAsync<TNew>(Func<T, ValueTask<TNew>> func)
+	{
+		if (!_success) return ValueTask.FromResult(new Result<TNew>(Error!));
+
+		try
+		{
+			var task = func(Value!);
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return ValueTask.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<TNew> task)
+		{
+			try
+			{
+				var value = await task;
+				return new Result<TNew>(value);
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+
+	/// <summary>
+	/// Maps the success value of the result to a new result using an asynchronous mapping function, or does nothing if
+	/// the result is a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success value to a new result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result, or completes synchronously by returning a new result containing the failure
+	/// value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> ThenAsync<TNew>(Func<T, ValueTask<Result<TNew>>> func)
+	{
+		if (!_success) return ValueTask.FromResult(new Result<TNew>(Error!));
+
+		var task = func(Value!);
+		return CreateResult(task);
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<Result<TNew>> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Maps the success value of the result to a new result using an asynchronous mapping function, or does nothing if
+	/// the result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success value to a new result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result, returning any exception thrown by <paramref name="func"/> wrapped in an
+	/// <see cref="ExceptionError"/>, or completes synchronously by returning a new result containing the failure value
+	/// of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> ThenTryAsync<TNew>(Func<T, ValueTask<Result<TNew>>> func)
+	{
+		if (!_success) return ValueTask.FromResult(new Result<TNew>(Error!));
+
+		try
+		{
+			var task = func(Value!);
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return ValueTask.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<Result<TNew>> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+}
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Maps the success value of the result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result and constructing a new result containing the mapped value, or completes
+	/// synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> MapAsync<TNew>(Func<T, Task<TNew>> func)
+	{
+		if (!_success) return Task.FromResult(new Result<TNew>(Error!));
+
+		var task = func(Value!);
+		return CreateResult(task);
+
+		static async Task<Result<TNew>> CreateResult(Task<TNew> task)
+		{
+			var value = await task;
+			return new Result<TNew>(value);
+		}
+	}
+
+	/// <summary>
+	/// Maps the success value of the result using an asynchronous mapping function, or does nothing if the result is a
+	/// failure. If the mapping function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result and constructing a new result containing the mapped value, returning any exception
+	/// thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/> or completes synchronously by
+	/// returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> TryMapAsync<TNew>(Func<T, Task<TNew>> func)
+	{
+		if (!_success) return Task.FromResult(new Result<TNew>(Error!));
+
+		try
+		{
+			var task = func(Value!);
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return Task.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async Task<Result<TNew>> CreateResult(Task<TNew> task)
+		{
+			try
+			{
+				var value = await task;
+				return new Result<TNew>(value);
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+
+	/// <summary>
+	/// Maps the success value of the result to a new result using an asynchronous mapping function, or does nothing if
+	/// the result is a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success value to a new result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result, or completes synchronously by returning a new result containing the failure
+	/// value of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> ThenAsync<TNew>(Func<T, Task<Result<TNew>>> func)
+	{
+		if (!_success) return Task.FromResult(new Result<TNew>(Error!));
+
+		var task = func(Value!);
+		return CreateResult(task);
+
+		static async Task<Result<TNew>> CreateResult(Task<Result<TNew>> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Maps the success value of the result to a new result using an asynchronous mapping function, or does nothing if
+	/// the result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success value to a new result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function on
+	/// the success value of the result, returning any exception thrown by <paramref name="func"/> wrapped in an
+	/// <see cref="ExceptionError"/>, or completes synchronously by returning a new result containing the failure value
+	/// of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> ThenTryAsync<TNew>(Func<T, Task<Result<TNew>>> func)
+	{
+		if (!_success) return Task.FromResult(new Result<TNew>(Error!));
+
+		try
+		{
+			var task = func(Value!);
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return Task.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async Task<Result<TNew>> CreateResult(Task<Result<TNew>> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+}
--- a/src/Result/Result.Unbox.cs
+++ b/src/Result/Result.Unbox.cs
@ -0,0 +1,63 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.Contracts;
+
+namespace Geekeey.Extensions.Result;
+
+public readonly partial struct Result<T>
+{
+	/// <summary>
+	/// Tries to get the success value from the result.
+	/// </summary>
+	/// <param name="value">The success value of the result.</param>
+	/// <returns>Whether the result has success value.</returns>
+	[Pure]
+	public bool TryGetValue([MaybeNullWhen(false)] out T value)
+	{
+		value = Value!;
+
+		return _success;
+	}
+
+	/// <summary>
+	/// Tries to get the success value from the result.
+	/// </summary>
+	/// <param name="value">The success value of the result.</param>
+	/// <param name="error">The failure value of the result.</param>
+	/// <returns>Whether the result has a success value.</returns>
+	[Pure]
+	public bool TryGetValue([MaybeNullWhen(false)] out T value, [MaybeNullWhen(true)] out Error error)
+	{
+		value = Value!;
+		error = !_success ? Error : null!;
+
+		return _success;
+	}
+
+	/// <summary>
+	/// Tries to get the failure value from the result.
+	/// </summary>
+	/// <param name="error">The failure value of the result.</param>
+	/// <returns>Whether the result has a failure value.</returns>
+	[Pure]
+	public bool TryGetError([MaybeNullWhen(false)] out Error error)
+	{
+		error = !_success ? Error : null!;
+
+		return !_success;
+	}
+
+	/// <summary>
+	/// Tries to get the failure value from the result.
+	/// </summary>
+	/// <param name="error">The failure value of the result.</param>
+	/// <param name="value">The success value of the result.</param>
+	/// <returns>Whether the result a failure value.</returns>
+	[Pure]
+	public bool TryGetError([MaybeNullWhen(false)] out Error error, [MaybeNullWhen(true)] out T value)
+	{
+		error = !_success ? Error : null!;
+		value = Value!;
+
+		return !_success;
+	}
+}
--- a/src/Result/Result.cs
+++ b/src/Result/Result.cs
@ -0,0 +1,76 @@
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.Contracts;
+
+namespace Geekeey.Extensions.Result;
+
+/// <summary>
+/// A type which contains either a success value or a failure value, which is represented by an <see cref="Error"/>.
+/// </summary>
+/// <typeparam name="T">The type of the success value.</typeparam>
+[DebuggerTypeProxy(typeof(Result<>.ResultDebugProxy))]
+public readonly partial struct Result<T>
+{
+	private readonly bool _success;
+
+	private readonly T? _value;
+	private readonly Error? _error;
+
+	/// <summary>
+	/// Creates a new result with a success value.
+	/// </summary>
+	/// <param name="value">The success value.</param>
+	public Result(T value)
+	{
+		_success = true;
+		_value = value;
+		_error = default;
+	}
+
+	/// <summary>
+	/// Creates a new result with a failure value.
+	/// </summary>
+	/// <param name="error">The error of the result.</param>
+	public Result(Error error)
+	{
+		_success = false;
+		_value = default;
+		_error = error;
+	}
+
+	internal T? Value => _value;
+
+	internal Error? Error => _success ? null : (_error ?? Error.DefaultValueError);
+
+	/// <summary>
+	/// Whether the result is a success.
+	/// </summary>
+	/// <remarks>
+	/// This is always the inverse of <see cref="IsFailure"/> but is more specific about intent.
+	/// </remarks>
+	[MemberNotNullWhen(true, nameof(Value))]
+	public bool IsSuccess => _success;
+
+	/// <summary>
+	/// Whether the result is a failure.
+	/// </summary>
+	/// <remarks>
+	/// This is always the inverse of <see cref="IsSuccess"/> but is more specific about intent.
+	/// </remarks>
+	[MemberNotNullWhen(true, nameof(Error))]
+	public bool IsFailure => !_success;
+
+	/// <summary>
+	/// Gets a string representation of the result.
+	/// </summary>
+	[Pure]
+	public override string ToString()
+		=> _success ? $"Success {{ {Value} }}" : $"Failure {{ {Error} }}";
+
+	private sealed class ResultDebugProxy(Result<T> result)
+	{
+		public bool IsSuccess => result.IsSuccess;
+
+		public object? Value => result.IsSuccess ? result.Value : result.Error;
+	}
+}
--- a/src/Result/Result.csproj
+++ b/src/Result/Result.csproj
@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <InternalsVisibleTo Include="$(AssemblyName).Tests" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include=".\package-readme.md" Pack="true" PackagePath="\" />
+    <None Include="Project.props" Pack="true" PackagePath="build\$(AssemblyName).props" />
+  </ItemGroup>
+</Project>
--- a/src/Result/package-readme.md
+++ b/src/Result/package-readme.md
@ -0,0 +1,2 @@
+Result is a simple yet powerful [result type](https://doc.rust-lang.org/std/result/) implementation for C#, containing a
+variety of utilities and standard functions for working with result types and integrating them into the rest of C#.