My default EditorConfig for C# projects

.editorconfig

# Rules in this file were initially inferred by Visual Studio IntelliCode from the C:\Workspace\Uniforms codebase based on best match to current usage at 12-4-2019
# You can modify the rules from these initially generated values to suit your own policies
# You can learn more about editorconfig here: https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-code-style-settings-reference
[*.cs]

#Core editorconfig formatting - indentation

#use soft tabs (spaces) for indentation
indent_style = space
indent_size = 4 
insert_final_newline = true 
charset = utf-8-bom 

# Organize usings 
dotnet_sort_system_directives_first = true 
dotnet_separate_import_directive_groups = true
# this. preferences 
dotnet_style_qualification_for_field = true:suggestion
dotnet_style_qualification_for_property = true:suggestion
dotnet_style_qualification_for_method = true:suggestion 
dotnet_style_qualification_for_event = true:suggestion 
# 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:suggestion 
dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:suggestion 
dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:suggestion 
dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent 
# Modifier preferences 
dotnet_style_require_accessibility_modifiers = always:warning 
dotnet_style_readonly_field = true:suggestion 
# Expression-level preferences 
dotnet_style_object_initializer = true:suggestion 
dotnet_style_collection_initializer = true:suggestion 
dotnet_style_explicit_tuple_names = true:suggestion 
dotnet_style_null_propagation = true:suggestion 
dotnet_style_coalesce_expression = true:suggestion 
dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion 
dotnet_prefer_inferred_tuple_names = true:suggestion 
dotnet_prefer_inferred_anonymous_type_member_names = true:suggestion 
dotnet_style_prefer_auto_properties = true:suggestion 
dotnet_style_prefer_conditional_expression_over_assignment = true:suggestion 
dotnet_style_prefer_conditional_expression_over_return = true:suggestion 


############################### 
# C# Coding Conventions       # 
############################### 
[*.cs] 
# 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_methods = when_on_single_line:suggestion
csharp_style_expression_bodied_constructors = false:silent 
csharp_style_expression_bodied_operators = when_on_single_line:suggestion 
csharp_style_expression_bodied_properties = when_on_single_line:suggestion 
csharp_style_expression_bodied_indexers = when_on_single_line:suggestion 
csharp_style_expression_bodied_accessors = true:suggestion 
# Pattern matching preferences 
csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion 
csharp_style_pattern_matching_over_as_with_null_check = true:suggestion 
# Null-checking preferences 
csharp_style_throw_expression = true:suggestion 
csharp_style_conditional_delegate_call = true:suggestion 
# Modifier preferences 
csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:suggestion 
# Expression-level preferences 
csharp_prefer_braces = true:warning 
csharp_style_deconstructed_variable_declaration = true:suggestion 
csharp_prefer_simple_default_expression = true:suggestion 
csharp_style_pattern_local_over_anonymous_function = true:suggestion 
csharp_style_inlined_variable_declaration = true:suggestion 
############################### 
# C# Formatting Rules         # 
############################### 
# New line preferences 
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 
csharp_new_line_between_query_expression_clauses = true 
# Indentation preferences 
csharp_indent_case_contents = true 
csharp_indent_switch_labels = true 
csharp_indent_labels = flush_left 
# Space preferences 
csharp_space_after_cast = false 
csharp_space_after_keywords_in_control_flow_statements = true 
csharp_space_between_method_call_parameter_list_parentheses = false 
csharp_space_between_method_declaration_parameter_list_parentheses = false 
csharp_space_between_parentheses = false 
csharp_space_before_colon_in_inheritance_clause = true 
csharp_space_after_colon_in_inheritance_clause = true 
csharp_space_around_binary_operators = before_and_after 
csharp_space_between_method_declaration_empty_parameter_list_parentheses = false 
csharp_space_between_method_call_name_and_opening_parenthesis = false 
csharp_space_between_method_call_empty_parameter_list_parentheses = false 
# Wrapping preferences 
csharp_preserve_single_line_statements = false 
csharp_preserve_single_line_blocks = true 

############################### 
# Naming Conventions          # 
############################### 
# Style Definitions 

## start with underscore style
dotnet_naming_style.start_with_underscore_style.required_prefix	= _
dotnet_naming_style.start_with_underscore_style.capitalization = camel_case

## Pascal style
dotnet_naming_style.pascal_style.capitalization	= pascal_case

## Camelcase style
dotnet_naming_style.camel_case_style.capitalization	= camel_case

## Private readonly fields
dotnet_naming_symbols.private_readonly_fields.applicable_kinds = field
dotnet_naming_symbols.private_readonly_fields.applicable_accessibilities = private
dotnet_naming_symbols.private_readonly_fields.required_modifiers = readonly

dotnet_naming_rule.private_readonly_fields_should_start_with_underscore.severity = suggestion
dotnet_naming_rule.private_readonly_fields_should_start_with_underscore.symbols = private_readonly_fields
dotnet_naming_rule.private_readonly_fields_should_start_with_underscore.style = start_with_underscore_style

## Private const fields
dotnet_naming_symbols.private_const_fields.applicable_kinds = field
dotnet_naming_symbols.private_const_fields.applicable_accessibilities = private
dotnet_naming_symbols.private_const_fields.required_modifiers = const

dotnet_naming_rule.private_const_should_start_with_underscore.severity = suggestion
dotnet_naming_rule.private_const_should_start_with_underscore.symbols = private_const_fields
dotnet_naming_rule.private_const_should_start_with_underscore.style = start_with_underscore_style

## Public const fields
dotnet_naming_symbols.public_const_fields.applicable_kinds = field
dotnet_naming_symbols.public_const_fields.applicable_accessibilities = public
dotnet_naming_symbols.public_const_fields.required_modifiers = const

dotnet_naming_rule.public_const_should_be_pascal_case.severity = suggestion
dotnet_naming_rule.public_const_should_be_pascal_case.symbols = public_const_fields
dotnet_naming_rule.public_const_should_be_pascal_case.style = pascal_style

## Private methods
dotnet_naming_symbols.private_methods.applicable_kinds = method
dotnet_naming_symbols.private_methods.applicable_accessibilities = private

dotnet_naming_rule.private_methods_should_start_with_underscore.severity = suggestion
dotnet_naming_rule.private_methods_should_start_with_underscore.symbols = private_methods
dotnet_naming_rule.private_methods_should_start_with_underscore.style = start_with_underscore_style

## parameters
dotnet_naming_symbols.parameters.applicable_kinds = parameter

dotnet_naming_rule.parameters_should_be_camelcase.severity = warning
dotnet_naming_rule.parameters_should_be_camelcase.symbols = parameters
dotnet_naming_rule.parameters_should_be_camelcase.style = camel_case_style

############################### 
# Guidelines                  # 
############################### 
# All files
[*]
guidelines = 80

# C# or VB files
[*.{cs,vb}]
guidelines = 80, 120