--- name: dotnet-strict description: Apply strict .NET/C# coding standards to a project or solution. Adds Roslynator and Meziantou analyzers, a comprehensive .editorconfig with 80+ diagnostic rules, naming conventions, and performance warnings. Use when the user wants to enforce strict code quality, set up analyzers, or add an .editorconfig to a .NET project. disable-model-invocation: true argument-hint: "[solution or project path]" --- ## What This Does Applies a strict, production-grade coding standard to a .NET project by: 1. Adding analyzer NuGet packages to the project(s) 2. Creating a comprehensive `.editorconfig` at the solution root 3. Verifying the setup compiles ## Step 1: Determine Target If `$ARGUMENTS` is provided, use it as the solution/project path. Otherwise, look for a `.sln` or `.csproj` in the current directory. Identify all `.csproj` files that should get analyzers (typically `src/` projects, not test projects). ## Step 2: Add Analyzer Packages Add these analyzer packages to each source project (not test projects): ```bash dotnet add package Roslynator.Analyzers dotnet add package Meziantou.Analyzer ``` These should be added as development-only dependencies. After adding, verify the package references include `PrivateAssets="all"` so they don't flow to consumers: ```xml all runtime; build; native; contentfiles; analyzers; buildtransitive all runtime; build; native; contentfiles; analyzers; buildtransitive ``` ## Step 3: Create .editorconfig Create a `.editorconfig` file at the solution root (next to the `.sln` file, or at the repo root). If one already exists, merge the rules — do not overwrite existing customizations. The .editorconfig should contain the following rules: ```ini ; Strict .NET coding standards ; Based on ASYNKRON production configuration root = true [*] indent_style = space charset = utf-8 trim_trailing_whitespace = true insert_final_newline = true [*.cs] indent_size = 4 dotnet_sort_system_directives_first = true ; --- Code Style --- ; Don't use 'this.' qualifier dotnet_style_qualification_for_field = false:suggestion dotnet_style_qualification_for_property = false:suggestion ; Use int over Int32 dotnet_style_predefined_type_for_locals_parameters_members = true:warning dotnet_style_predefined_type_for_member_access = true:warning ; Require var csharp_style_var_for_built_in_types = true:warning csharp_style_var_when_type_is_apparent = true:warning csharp_style_var_elsewhere = true:suggestion ; Disallow throw expressions csharp_style_throw_expression = false:suggestion ; Braces on new lines (Allman style) csharp_new_line_before_open_brace = all csharp_new_line_before_else = true csharp_new_line_before_catch = true csharp_new_line_before_finally = true csharp_new_line_before_members_in_object_initializers = true csharp_new_line_before_members_in_anonymous_types = true ; File-scoped namespaces csharp_style_namespace_declarations = file_scoped ; Always use braces csharp_prefer_braces = true ; Modifier order csharp_preferred_modifier_order = public, private, protected, internal, static, extern, new, virtual, abstract, sealed, override, readonly, unsafe, volatile, async:suggestion ; No multiple blank lines dotnet_style_allow_multiple_blank_lines_experimental = false dotnet_diagnostic.IDE2000.severity = warning ; Unused parameters (non-public only) dotnet_code_quality_unused_parameters = non_public ; --- Naming Conventions --- ; Constants: PascalCase dotnet_naming_rule.constant_fields_should_be_pascal_case.severity = suggestion dotnet_naming_rule.constant_fields_should_be_pascal_case.symbols = constant_fields dotnet_naming_rule.constant_fields_should_be_pascal_case.style = pascal_case_style dotnet_naming_symbols.constant_fields.applicable_kinds = field dotnet_naming_symbols.constant_fields.required_modifiers = const dotnet_naming_style.pascal_case_style.capitalization = pascal_case ; Static fields: PascalCase dotnet_naming_rule.pascal_case_for_static_fields.severity = suggestion dotnet_naming_rule.pascal_case_for_static_fields.symbols = static_fields dotnet_naming_rule.pascal_case_for_static_fields.style = pascal_case_style dotnet_naming_rule.pascal_case_for_static_fields.priority = 1 dotnet_naming_symbols.static_fields.applicable_kinds = field dotnet_naming_symbols.static_fields.applicable_accessibilities = public, private, internal dotnet_naming_symbols.static_fields.required_modifiers = static ; Private/internal fields: _camelCase dotnet_naming_rule.camel_case_for_private_internal_fields.severity = suggestion dotnet_naming_rule.camel_case_for_private_internal_fields.symbols = private_internal_fields dotnet_naming_rule.camel_case_for_private_internal_fields.style = camel_case_underscore_style dotnet_naming_rule.camel_case_for_private_internal_fields.priority = 3 dotnet_naming_symbols.private_internal_fields.applicable_kinds = field dotnet_naming_symbols.private_internal_fields.applicable_accessibilities = private, internal dotnet_naming_style.camel_case_underscore_style.required_prefix = _ dotnet_naming_style.camel_case_underscore_style.capitalization = camel_case ; --- Roslynator Rules --- ; Resource can be disposed asynchronously dotnet_diagnostic.RCS1261.severity = warning ; File contains no code dotnet_diagnostic.RCS1093.severity = error ; Implement exception constructors (noisy — disabled) dotnet_diagnostic.RCS1194.severity = none ; Add parentheses when necessary (noisy — disabled) dotnet_diagnostic.RCS1123.severity = none ; Unused parameter dotnet_diagnostic.RCS1163.severity = warning ; Unused type parameter dotnet_diagnostic.RCS1164.severity = warning ; Unused 'this' parameter dotnet_diagnostic.RCS1175.severity = warning ; Remove unused member declaration dotnet_diagnostic.RCS1213.severity = warning ; --- Meziantou Rules --- ; Use explicit enum value instead of 0 dotnet_diagnostic.MA0099.severity = warning ; Local variables should not hide other symbols dotnet_diagnostic.MA0084.severity = warning ; Specify the parameter name in ArgumentException dotnet_diagnostic.MA0015.severity = warning ; Method is too long dotnet_diagnostic.MA0051.severity = warning ; Use String.Equals instead of equality operator dotnet_diagnostic.MA0006.severity = warning ; Avoid implicit culture-sensitive methods dotnet_diagnostic.MA0074.severity = warning ; IEqualityComparer or IComparer is missing dotnet_diagnostic.MA0002.severity = warning ; --- IDE Rules --- ; Remove unnecessary usings dotnet_diagnostic.IDE0005.severity = none ; Add braces dotnet_diagnostic.IDE0011.severity = warning ; Use pattern matching dotnet_diagnostic.IDE0020.severity = warning ; Use coalesce expression (non-nullable) dotnet_diagnostic.IDE0029.severity = warning ; Use coalesce expression (nullable) dotnet_diagnostic.IDE0030.severity = warning ; Use null propagation dotnet_diagnostic.IDE0031.severity = warning ; Remove unreachable code dotnet_diagnostic.IDE0035.severity = warning ; Order modifiers dotnet_diagnostic.IDE0036.severity = warning ; Use pattern matching dotnet_diagnostic.IDE0038.severity = warning ; Format string contains invalid placeholder dotnet_diagnostic.IDE0043.severity = warning ; Make field readonly dotnet_diagnostic.IDE0044.severity = warning ; Remove unused private members dotnet_diagnostic.IDE0051.severity = warning ; Fix formatting dotnet_diagnostic.IDE0055.severity = suggestion ; Unnecessary assignment dotnet_diagnostic.IDE0059.severity = warning ; Make local function static dotnet_diagnostic.IDE0062.severity = warning ; Convert to file-scoped namespace dotnet_diagnostic.IDE0161.severity = warning ; Remove unnecessary lambda expression dotnet_diagnostic.IDE0200.severity = warning ; --- Compiler Warnings --- ; Unreachable code detected dotnet_diagnostic.CS0162.severity = warning ; Field is never used dotnet_diagnostic.CS0169.severity = warning ; --- Microsoft Code Analysis (CA) Rules --- ; Performance dotnet_diagnostic.CA1822.severity = warning dotnet_code_quality.CA1822.api_surface = private, internal dotnet_diagnostic.CA1825.severity = warning dotnet_diagnostic.CA1826.severity = warning dotnet_diagnostic.CA1827.severity = warning dotnet_diagnostic.CA1828.severity = warning dotnet_diagnostic.CA1829.severity = warning dotnet_diagnostic.CA1830.severity = warning dotnet_diagnostic.CA1831.severity = warning dotnet_diagnostic.CA1832.severity = warning dotnet_diagnostic.CA1833.severity = warning dotnet_diagnostic.CA1834.severity = warning dotnet_diagnostic.CA1835.severity = warning dotnet_diagnostic.CA1836.severity = warning dotnet_diagnostic.CA1837.severity = warning dotnet_diagnostic.CA1838.severity = warning dotnet_diagnostic.CA1839.severity = warning dotnet_diagnostic.CA1840.severity = warning dotnet_diagnostic.CA1841.severity = warning dotnet_diagnostic.CA1842.severity = warning dotnet_diagnostic.CA1843.severity = warning dotnet_diagnostic.CA1844.severity = warning dotnet_diagnostic.CA1845.severity = warning dotnet_diagnostic.CA1846.severity = warning dotnet_diagnostic.CA1847.severity = warning dotnet_diagnostic.CA1852.severity = warning dotnet_diagnostic.CA1854.severity = warning dotnet_diagnostic.CA1855.severity = warning dotnet_diagnostic.CA1856.severity = error dotnet_diagnostic.CA1857.severity = warning dotnet_diagnostic.CA1858.severity = warning ; Unused code dotnet_diagnostic.CA1801.severity = warning dotnet_diagnostic.CA1811.severity = warning dotnet_diagnostic.CA1823.severity = warning dotnet_diagnostic.CA1802.severity = warning dotnet_diagnostic.CA1805.severity = warning dotnet_diagnostic.CA1810.severity = warning dotnet_diagnostic.CA1821.severity = warning ; Correctness dotnet_diagnostic.CA1018.severity = warning dotnet_diagnostic.CA1047.severity = warning dotnet_diagnostic.CA1305.severity = warning dotnet_diagnostic.CA1507.severity = warning dotnet_diagnostic.CA1510.severity = warning dotnet_diagnostic.CA1511.severity = warning dotnet_diagnostic.CA1512.severity = warning dotnet_diagnostic.CA1513.severity = warning dotnet_diagnostic.CA1725.severity = suggestion dotnet_diagnostic.CA2008.severity = warning dotnet_diagnostic.CA2009.severity = warning dotnet_diagnostic.CA2011.severity = warning dotnet_diagnostic.CA2012.severity = warning dotnet_diagnostic.CA2013.severity = warning dotnet_diagnostic.CA2014.severity = warning dotnet_diagnostic.CA2016.severity = warning dotnet_diagnostic.CA2022.severity = warning dotnet_diagnostic.CA2200.severity = warning dotnet_diagnostic.CA2201.severity = warning dotnet_diagnostic.CA2208.severity = warning dotnet_diagnostic.CA2245.severity = warning dotnet_diagnostic.CA2246.severity = warning dotnet_diagnostic.CA2249.severity = warning [*.{xml,config,*proj,nuspec,props,resx,targets,yml,tasks}] indent_size = 2 [*.json] indent_size = 2 [*.sh] indent_size = 4 end_of_line = lf [tests/**/*.cs] ; Allow parameter capture in test constructors dotnet_diagnostic.CS9107.severity = silent ``` ## Step 4: Build and Verify ```bash dotnet build ``` The first build after adding analyzers will likely produce many warnings. This is expected — it shows the analyzers are working. Report a summary of the warnings found, grouped by category: - How many performance warnings (CA18xx) - How many unused code warnings (RCS1163, RCS1213, CA1811, etc.) - How many style warnings (IDE0xxx) - How many Meziantou warnings (MA0xxx) ## Step 5: Optional — Auto-fix Suggest running roslynator to auto-fix what it can: ```bash roslynator fix ``` ## What the Rules Cover **Performance (CA18xx):** Use Span/Memory over substring, prefer Count property over Count(), use char overloads, seal internal types, prefer TryGetValue, avoid zero-length arrays. **Dead Code (RCS1163, RCS1213, CA1811, IDE0051):** Unused parameters, unused type parameters, unused members, uncalled private code. **Correctness (CA2xxx):** Rethrow to preserve stack, don't raise reserved exceptions, forward CancellationToken, avoid infinite recursion, use ValueTask correctly. **Culture Safety (MA0074, MA0006, CA1305):** Avoid implicit culture-sensitive methods, use String.Equals, specify IFormatProvider. **Modern C# Style:** File-scoped namespaces, pattern matching, null propagation, coalesce expressions, var everywhere, braces always. **Naming:** Constants PascalCase, static fields PascalCase, private fields _camelCase.

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