Default EditorConfig for new csharp/web projects

.editorconfig

# Top-most EditorConfig file
root = true

# Default settings for all files
[*]
charset = utf-8
end_of_line = lf
insert_final_newline = false
indent_size = 4
tab_width = 4
indent_style = space
max_line_length = 120

# Indentation for other file types
[*.cshtml]
indent_style = space
indent_size = 2
tab_width = 2

[*.xml]
indent_size = 2
indent_style = space
tab_width = 2

[*.js]
indent_style = space
indent_size = 2
tab_width = 2

[*.ts]
indent_style = space
indent_size = 2
tab_width = 2

[*.jsx]
indent_style = space
indent_size = 2
tab_width = 2

[*.tsx]
indent_style = space
indent_size = 2
tab_width = 2

[*.html]
indent_style = space
indent_size = 2
tab_width = 2

[*.css]
indent_style = space
indent_size = 2
tab_width = 2

[*.sql]
indent_style = space
indent_size = 4
tab_width = 4

# Default indentation for specific file types
[*.cs]
indent_style = space
indent_size = 4
tab_width = 4

# Apply global severity settings
dotnet_analyzer_diagnostic.severity = error
dotnet_analyzer_diagnostic.category-StyleCop.severity = error

# === File header enforcement (StyleCop) ===
dotnet_diagnostic.SA1633.severity = warning
file_header_template = // Copyright (c) 2025 MyCompany. All rights reserved.

# Enforce block-scoped namespaces
csharp_style_namespace_declarations = block_scoped:error

# System usings first
dotnet_sort_system_directives_first = true:error

# Separate import directive groups (System, third-party, project)
dotnet_separate_import_directive_groups = true

# Usings must be inside the namespace
dotnet_style_qualification_for_namespace = true
dotnet_style_prefer_usings_inside_namespace = true:error

# Warn on unused parameters and variables
dotnet_diagnostic.CS0168.severity = warning  # variable declared but never used
dotnet_diagnostic.CS0219.severity = warning  # variable assigned but never used


# === Enforce _camelCase for private fields and properties (StyleCop / Roslynator) ===
dotnet_naming_rule.private_fields_should_be__camelcase.severity = error
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
dotnet_naming_symbols.private_fields.required_modifiers = 

# === Enforce readonly for constructor-injected fields (Roslynator / custom rule) ===
dotnet_diagnostic.RCS1213.severity = error  # RCS1213: Remove unused member declaration
dotnet_diagnostic.RCS1118.severity = error  # Mark field as readonly (Roslynator)

# 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

dotnet_diagnostic.IDE0290.severity = none
dotnet_diagnostic.IDE0005.severity = warning
dotnet_diagnostic.IDE0035.severity = warning
dotnet_diagnostic.IDE0040.severity = warning
dotnet_diagnostic.IDE0044.severity = warning
dotnet_diagnostic.IDE0280.severity = warning

# Language keywords vs BCL types preferences
dotnet_style_predefined_type_for_locals_parameters_members = true:warning
dotnet_style_predefined_type_for_member_access = true:warning

# 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:warning

# 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

# 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

# Avoid primary constructors
csharp_style_prefer_primary_constructors = false

# var preferences
csharp_style_var_elsewhere = false:silent
csharp_style_var_for_built_in_types = false:silent
csharp_style_var_when_type_is_apparent = false:silent

# 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 = inside_namespace:warning

#### 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

# Naming rules

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_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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

# Symbol specifications

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_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_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 =

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_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_symbols.public_fields.applicable_kinds = field
dotnet_naming_symbols.public_fields.applicable_accessibilities = public, internal
dotnet_naming_symbols.public_fields.required_modifiers =

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_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_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_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 =

dotnet_naming_symbols.type_parameters.applicable_kinds = namespace
dotnet_naming_symbols.type_parameters.applicable_accessibilities = *
dotnet_naming_symbols.type_parameters.required_modifiers =

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

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_symbols.local_constants.applicable_kinds = local
dotnet_naming_symbols.local_constants.applicable_accessibilities = local
dotnet_naming_symbols.local_constants.required_modifiers = const

dotnet_naming_symbols.parameters.applicable_kinds = parameter
dotnet_naming_symbols.parameters.applicable_accessibilities = *
dotnet_naming_symbols.parameters.required_modifiers =

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

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_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_symbols.local_functions.applicable_kinds = local_function
dotnet_naming_symbols.local_functions.applicable_accessibilities = *
dotnet_naming_symbols.local_functions.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