.NET coding convention settings for EditorConfig

You can define and maintain consistent code style in your codebase by using an EditorConfig file. EditorConfig includes several core formatting properties, such as indent_style and indent_size. In Visual Studio, .NET coding conventions settings can also be configured by using an EditorConfig file. You can enable or disable individual .NET coding conventions and configure the degree to which you want each rule enforced, via a severity level.

Tip

  • When you define coding conventions in an EditorConfig file, you're configuring how you want the code style analyzers that are built into Visual Studio to analyze your code. The EditorConfig file is the configuration file for these analyzers.
  • Code style preferences for Visual Studio can also be set in the Text editor options dialog. However, EditorConfig settings take precedence and preferences you set in Options aren't associated with a particular project.

Convention categories

There are three supported .NET coding convention categories:

  • Language conventions

    Rules pertaining to the C# or Visual Basic language. For example, you can specify rules around using var or explicit types when defining variables, or preferring expression-bodied members.

  • Formatting conventions

    Rules regarding the layout and structure of your code in order to make it easier to read. For example, you can specify rules around Allman braces, or preferring spaces in control blocks.

  • Naming conventions

    Rules regarding the naming of code elements. For example, you can specify that async methods must end in "Async".

Example EditorConfig file

To help you get started, here is an example .editorconfig file with the default options. In Visual Studio, you can generate this file and save it to a project at Tools > Options > Text Editor > [C# or Basic] > Code Style > General. Then, click the Generate .editorconfig file from settings button. For more information, see Code style preferences.

# Remove the line below if you want to inherit .editorconfig settings from higher directories
root = true

# C# files
[*.cs]

#### Core EditorConfig Options ####

# Indentation and spacing
indent_size = 4
indent_style = space
tab_width = 4

# New line preferences
end_of_line = crlf
insert_final_newline = false

#### .NET Coding Conventions ####

# Organize usings
dotnet_separate_import_directive_groups = false
dotnet_sort_system_directives_first = false

# 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_prefer_auto_properties = true:silent
dotnet_style_prefer_compound_assignment = true:suggestion
dotnet_style_prefer_conditional_expression_over_assignment = true:silent
dotnet_style_prefer_conditional_expression_over_return = true:silent
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_interpolation = true:suggestion

# Field preferences
dotnet_style_readonly_field = true:suggestion

# Parameter preferences
dotnet_code_quality_unused_parameters = all:suggestion

#### C# Coding Conventions ####

# 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:silent
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_switch_expression = true:suggestion

# Null-checking preferences
csharp_style_conditional_delegate_call = true:suggestion

# Modifier preferences
csharp_prefer_static_local_function = true:suggestion
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

#### 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 styles ####

# Naming rules

dotnet_naming_rule.interface_should_be_begins_with_i.severity = suggestion
dotnet_naming_rule.interface_should_be_begins_with_i.symbols = interface
dotnet_naming_rule.interface_should_be_begins_with_i.style = begins_with_i

dotnet_naming_rule.types_should_be_pascal_case.severity = suggestion
dotnet_naming_rule.types_should_be_pascal_case.symbols = types
dotnet_naming_rule.types_should_be_pascal_case.style = pascal_case

dotnet_naming_rule.non_field_members_should_be_pascal_case.severity = suggestion
dotnet_naming_rule.non_field_members_should_be_pascal_case.symbols = non_field_members
dotnet_naming_rule.non_field_members_should_be_pascal_case.style = pascal_case

# Symbol specifications

dotnet_naming_symbols.interface.applicable_kinds = interface
dotnet_naming_symbols.interface.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
dotnet_naming_symbols.interface.required_modifiers =

dotnet_naming_symbols.types.applicable_kinds = class, struct, interface, enum
dotnet_naming_symbols.types.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
dotnet_naming_symbols.types.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 =

# Naming styles

dotnet_naming_style.pascal_case.required_prefix =
dotnet_naming_style.pascal_case.required_suffix =
dotnet_naming_style.pascal_case.word_separator =
dotnet_naming_style.pascal_case.capitalization = pascal_case

dotnet_naming_style.begins_with_i.required_prefix = I
dotnet_naming_style.begins_with_i.required_suffix =
dotnet_naming_style.begins_with_i.word_separator =
dotnet_naming_style.begins_with_i.capitalization = pascal_case

Note

For more information about the supported .NET coding convention categories, see the Language conventions, Formatting conventions, and Naming conventions pages.

See also