.editorconfig¶

# dotnet-awesome-humans template | targets: net10.0, csharp-14 | last-reviewed: 2026-08-21 | last-used: 2026-09-24 | sources: ms-learn, meziantou
# Copy to the repository root. Trim rules you disagree with, but disagree deliberately.

root = true

[*]
charset = utf-8
end_of_line = lf
insert_final_newline = true
indent_style = space
indent_size = 4
trim_trailing_whitespace = true

[*.{json,jsonc,yml,yaml,props,targets,csproj,fsproj,slnx,slnf,xml,config}]
indent_size = 2

[*.md]
trim_trailing_whitespace = false

[*.{cs,fs}]
dotnet_analyzer_diagnostic.severity = warning

[*.cs]
# --- Language version and style: latest, expression-oriented, explicit intent ---
csharp_style_var_for_built_in_types = false:suggestion
csharp_style_var_when_type_is_apparent = true:suggestion
csharp_style_var_elsewhere = false:suggestion
csharp_style_expression_bodied_methods = when_on_single_line:suggestion
# Constructors too. Left unset, the default (block bodies) is raised to a warning by the bulk
# severity above and fails every one-line constructor (IDE0021).
csharp_style_expression_bodied_constructors = when_on_single_line:suggestion
csharp_style_expression_bodied_properties = true:suggestion
csharp_style_namespace_declarations = file_scoped:warning
csharp_style_prefer_primary_constructors = true:suggestion
csharp_style_prefer_switch_expression = true:warning
csharp_style_pattern_matching_over_as_with_null_check = true:warning
csharp_style_prefer_null_check_over_type_check = true:warning
csharp_prefer_simple_using_statement = true:warning
csharp_style_prefer_top_level_statements = true:suggestion
csharp_style_prefer_method_group_conversion = true:suggestion
csharp_using_directive_placement = outside_namespace:warning

# Prefer auto-implemented properties over trivial hand-written backing fields. Severity is set
# here rather than on dotnet_style_prefer_auto_properties below, which is the same rule:
# a dotnet_diagnostic entry wins over the option's trailing severity, so carrying both
# would leave one of them silently dead.
dotnet_diagnostic.IDE0032.severity = warning

# The bulk severity above raises IDE0058 (unused expression value) to a warning, which demands
# `_ =` on every discarded result, including each Assert.Throws in a test project. Keep it silent.
dotnet_diagnostic.IDE0058.severity = silent

# The one globalization rule AnalysisLevel=latest-recommended leaves silent: string.Equals
# without a StringComparison. CA1304/1305/1309/1310/1311 already warn (opinions/globalization.md).
dotnet_diagnostic.CA1307.severity = warning

# The one Meziantou.Analyzer TimeProvider rule that ships disabled: prefer overloads taking a
# TimeProvider. MA0166/MA0188 ship enabled at info severity and are raised to warnings by the
# bulk dotnet_analyzer_diagnostic.severity above (opinions/datetime.md).
dotnet_diagnostic.MA0167.severity = warning

# --- Nullability and correctness ---
dotnet_style_require_accessibility_modifiers = always:warning
dotnet_style_readonly_field = true:warning
dotnet_style_prefer_auto_properties = true # severity: IDE0032 above
dotnet_style_collection_initializer = true:suggestion
dotnet_style_prefer_collection_expression = true:warning
dotnet_style_object_initializer = true:suggestion
dotnet_style_coalesce_expression = true:warning
dotnet_style_null_propagation = true:warning

# --- Naming: standard .NET conventions ---
dotnet_naming_rule.interfaces_begin_with_i.severity = warning
dotnet_naming_rule.interfaces_begin_with_i.symbols = interfaces
dotnet_naming_rule.interfaces_begin_with_i.style = prefix_i
dotnet_naming_symbols.interfaces.applicable_kinds = interface
dotnet_naming_style.prefix_i.required_prefix = I
dotnet_naming_style.prefix_i.capitalization = pascal_case

# Constants take PascalCase. A rule with required_modifiers is more specific than the private-field
# rule below, so it wins for consts; without it, a private const needs an underscore prefix.
dotnet_naming_rule.constants_pascal_case.severity = warning
dotnet_naming_rule.constants_pascal_case.symbols = constants
dotnet_naming_rule.constants_pascal_case.style = pascal_case
dotnet_naming_symbols.constants.applicable_kinds = field, local
dotnet_naming_symbols.constants.applicable_accessibilities = *
dotnet_naming_symbols.constants.required_modifiers = const
dotnet_naming_style.pascal_case.capitalization = pascal_case

dotnet_naming_rule.private_fields_camel_underscore.severity = warning
dotnet_naming_rule.private_fields_camel_underscore.symbols = private_fields
dotnet_naming_rule.private_fields_camel_underscore.style = underscore_camel
dotnet_naming_symbols.private_fields.applicable_kinds = field
dotnet_naming_symbols.private_fields.applicable_accessibilities = private
dotnet_naming_style.underscore_camel.required_prefix = _
dotnet_naming_style.underscore_camel.capitalization = camel_case

[*.fs]
fsharp_multiline_bracket_style = stroustrup