My EditorConfig file for Xamarin development

.editorconfig

# EditorConfig is awesome: http://EditorConfig.org

# Based on:
# https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-code-style-settings-reference
# https://github.com/dotnet/roslyn/blob/master/.editorconfig


# top-most EditorConfig file
root = true

# Baseline
# Don't use tabs for indentation.
[*]
charset = utf-8
indent_style = space
trim_trailing_whitespace = true
max_line_length = 130

# Code files
[*.{cs,csx,vb,vbx}]
indent_size = 4
insert_final_newline = true
charset = utf-8-bom

# MSBuild
[*.{csproj,proj,projitems,shproj,fsproj,target,props}]
indent_size = 2

# XML config files
[*.{config,nuspec,resx}]
indent_size = 2

# XML Android files
[*.{axml,xml}]
indent_size = 2

# XAML files
[*.{xaml}]
indent_size = 4

# JSON files
[*.json]
indent_size = 2

# F# files
[*.{fs, fsx, fsi}]
indent_size = 4

# Dotnet code style settings:
[*.{cs,vb}]

# Sort using and Import directives with System.* appearing first
dotnet_sort_system_directives_first = true

# Avoid "this." and "Me." if not necessary
dotnet_style_qualification_for_field = false:suggestion
dotnet_style_qualification_for_property = false:suggestion
dotnet_style_qualification_for_method = false:suggestion
dotnet_style_qualification_for_event = false:suggestion

# Use language keywords instead of framework type names for type references
dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
dotnet_style_predefined_type_for_member_access = true:suggestion

# Suggest more modern language features when available
dotnet_style_object_initializer = true:suggestion
dotnet_style_collection_initializer = true:suggestion
dotnet_style_coalesce_expression = true:suggestion
dotnet_style_null_propagation = true:suggestion
dotnet_style_explicit_tuple_names = true:suggestion

# CSharp code style settings:
[*.cs]

# Spacing options
csharp_space_after_cast = true
csharp_space_between_method_declaration_parameter_list_parentheses = false
csharp_space_between_method_call_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

# spaces before parens
csharp_space_between_method_declaration_name_and_open_parenthesis = false
csharp_space_between_method_call_name_and_opening_parenthesis = false
csharp_space_after_keywords_in_control_flow_statements = true

# Newline settings
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

# Switch indentation
csharp_indent_switch_labels = true
csharp_indent_case_contents = true

# Prefer "var" everywhere it's apparent
csharp_style_var_for_built_in_types = true:none
csharp_style_var_when_type_is_apparent = true:suggestion
csharp_style_var_elsewhere = true:none

# Prefer method-like constructs to have a block body
csharp_style_expression_bodied_methods = false:none
csharp_style_expression_bodied_constructors = false:none
csharp_style_expression_bodied_operators = false:none

# Prefer property-like constructs to have an expression-body
csharp_style_expression_bodied_properties = true:none
csharp_style_expression_bodied_indexers = true:none
csharp_style_expression_bodied_accessors = true:none

# Suggest more modern language features when available
csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
csharp_style_inlined_variable_declaration = true:suggestion
csharp_style_throw_expression = true:suggestion
csharp_style_conditional_delegate_call = true:suggestion

# Blocks are allowed
csharp_prefer_braces = true:none

# Non-private readonly fields are PascalCase
dotnet_naming_rule.non_private_readonly_fields_should_be_pascal_case.severity = suggestion
dotnet_naming_rule.non_private_readonly_fields_should_be_pascal_case.symbols = non_private_readonly_fields
dotnet_naming_rule.non_private_readonly_fields_should_be_pascal_case.style = non_private_readonly_field_style

dotnet_naming_symbols.non_private_readonly_fields.applicable_kinds = field
dotnet_naming_symbols.non_private_readonly_fields.applicable_accessibilities = public, protected, internal, protected internal, private protected
dotnet_naming_symbols.non_private_readonly_fields.required_modifiers = readonly

dotnet_naming_style.non_private_readonly_field_style.capitalization = pascal_case

# Constants are PascalCase
dotnet_naming_rule.constants_should_be_pascal_case.severity = suggestion
dotnet_naming_rule.constants_should_be_pascal_case.symbols = constants
dotnet_naming_rule.constants_should_be_pascal_case.style = constant_style

dotnet_naming_symbols.constants.applicable_kinds = field, local
dotnet_naming_symbols.constants.required_modifiers = const

dotnet_naming_style.constant_style.capitalization = pascal_case

# Instance fields are camelCase and start with _
dotnet_naming_rule.instance_fields_should_be_camel_case.severity = suggestion
dotnet_naming_rule.instance_fields_should_be_camel_case.symbols = instance_fields
dotnet_naming_rule.instance_fields_should_be_camel_case.style = instance_field_style

dotnet_naming_symbols.instance_fields.applicable_kinds = field

dotnet_naming_style.instance_field_style.capitalization = camel_case
dotnet_naming_style.instance_field_style.required_prefix = _

# Avoid redundant accessibility modifiers when they're default (omit_if_default:suggestion)
dotnet_style_require_accessibility_modifiers = always
dotnet_style_readonly_field = true:warning

# Other
dotnet_style_prefer_inferred_tuple_names = true:suggestion
dotnet_style_prefer_auto_properties = true:suggestion
dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion

dotnet_style_prefer_conditional_expression_over_assignment = true:suggestion

csharp_prefer_simple_default_expression = true:suggestion

csharp_style_deconstructed_variable_declaration = true:suggestion

Based on: https://kent-boogaart.com/blog/editorconfig-reference-for-c-developers

csharp_indent_block_contents = true
csharp_indent_braces = false
csharp_new_line_between_query_expression_clauses = true
csharp_preserve_single_line_blocks = false
csharp_preserve_single_line_statements = true
csharp_space_after_comma = true
csharp_space_after_dot = false
csharp_space_after_semicolon_in_for_statement = true
csharp_space_around_declaration_statements = do_not_ignore
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 = true
csharp_space_between_square_brackets = false