My preferred editorconfig

.editorconfig

# 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 = true
dotnet_sort_system_directives_first = true
file_header_template = unset

# this. and Me. preferences
dotnet_style_qualification_for_event = true
dotnet_style_qualification_for_field = true
dotnet_style_qualification_for_method = true
dotnet_style_qualification_for_property = true

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

# Parentheses preferences
dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity
dotnet_style_parentheses_in_other_binary_operators = always_for_clarity
dotnet_style_parentheses_in_other_operators = never_if_unnecessary
dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity

# Modifier preferences
dotnet_style_require_accessibility_modifiers = for_non_interface_members

# Expression-level preferences
dotnet_style_coalesce_expression = true
dotnet_style_collection_initializer = true
dotnet_style_explicit_tuple_names = true
dotnet_style_namespace_match_folder = true
dotnet_style_null_propagation = true
dotnet_style_object_initializer = true
dotnet_style_operator_placement_when_wrapping = beginning_of_line
dotnet_style_prefer_auto_properties = true:suggestion
dotnet_style_prefer_compound_assignment = true
dotnet_style_prefer_conditional_expression_over_assignment = true:suggestion
dotnet_style_prefer_conditional_expression_over_return = true:suggestion
dotnet_style_prefer_foreach_explicit_cast_in_source = when_strongly_typed
dotnet_style_prefer_inferred_anonymous_type_member_names = true
dotnet_style_prefer_inferred_tuple_names = true
dotnet_style_prefer_is_null_check_over_reference_equality_method = true
dotnet_style_prefer_simplified_boolean_expressions = true
dotnet_style_prefer_simplified_interpolation = true

# Field preferences
dotnet_style_readonly_field = true

# Parameter preferences
dotnet_code_quality_unused_parameters = non_public

# Suppression preferences
dotnet_remove_unnecessary_suppression_exclusions = 0

# New line preferences
dotnet_style_allow_multiple_blank_lines_experimental = false
dotnet_style_allow_statement_immediately_after_block_experimental = true

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

# var preferences
csharp_style_var_elsewhere = true
csharp_style_var_for_built_in_types = true
csharp_style_var_when_type_is_apparent = true

# Expression-bodied members
csharp_style_expression_bodied_accessors = true
csharp_style_expression_bodied_constructors = true
csharp_style_expression_bodied_indexers = true
csharp_style_expression_bodied_lambdas = true
csharp_style_expression_bodied_local_functions = true
csharp_style_expression_bodied_methods = true
csharp_style_expression_bodied_operators = true
csharp_style_expression_bodied_properties = true

# Pattern matching preferences
csharp_style_pattern_matching_over_as_with_null_check = true
csharp_style_pattern_matching_over_is_with_cast_check = true
csharp_style_prefer_extended_property_pattern = true
csharp_style_prefer_not_pattern = true
csharp_style_prefer_pattern_matching = true:suggestion
csharp_style_prefer_switch_expression = true

# Null-checking preferences
csharp_style_conditional_delegate_call = true

# Modifier preferences
csharp_prefer_static_local_function = true
csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async

# Code-block preferences
csharp_prefer_braces = true
csharp_prefer_simple_using_statement = true
csharp_style_namespace_declarations = file_scoped
csharp_style_prefer_method_group_conversion = true
csharp_style_prefer_top_level_statements = true

# Expression-level preferences
csharp_prefer_simple_default_expression = true
csharp_style_deconstructed_variable_declaration = true
csharp_style_implicit_object_creation_when_type_is_apparent = true
csharp_style_inlined_variable_declaration = true
csharp_style_prefer_index_operator = true
csharp_style_prefer_local_over_anonymous_function = true
csharp_style_prefer_null_check_over_type_check = true
csharp_style_prefer_range_operator = true
csharp_style_prefer_tuple_swap = true:silent
csharp_style_prefer_utf8_string_literals = true
csharp_style_throw_expression = true
csharp_style_unused_value_assignment_preference = discard_variable:silent
csharp_style_unused_value_expression_statement_preference = discard_variable

# 'using' directive preferences
csharp_using_directive_placement = outside_namespace:suggestion

# New line preferences
csharp_style_allow_blank_line_after_colon_in_constructor_initializer_experimental = false
csharp_style_allow_blank_lines_between_consecutive_braces_experimental = true
csharp_style_allow_embedded_statements_on_same_line_experimental = false

#### 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.constant_fields_should_be_all_upper.severity = suggestion
dotnet_naming_rule.constant_fields_should_be_all_upper.symbols = constant_fields
dotnet_naming_rule.constant_fields_should_be_all_upper.style = all_upper

dotnet_naming_rule.private_fields_should_be__camelcase.severity = suggestion
dotnet_naming_rule.private_fields_should_be__camelcase.symbols = private_fields
dotnet_naming_rule.private_fields_should_be__camelcase.style = _camelcase

# Symbol specifications

dotnet_naming_symbols.private_fields.applicable_kinds = field
dotnet_naming_symbols.private_fields.applicable_accessibilities = private
dotnet_naming_symbols.private_fields.required_modifiers = 

dotnet_naming_symbols.constant_fields.applicable_kinds = field, local
dotnet_naming_symbols.constant_fields.applicable_accessibilities = *
dotnet_naming_symbols.constant_fields.required_modifiers = const

# Naming styles

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.all_upper.required_prefix = 
dotnet_naming_style.all_upper.required_suffix = 
dotnet_naming_style.all_upper.word_separator = _
dotnet_naming_style.all_upper.capitalization = all_upper