Copy .editorconfig from dotnet/corefx repo (#584)

* Copy .editorconfig from https://github.com/dotnet/corefx/blob/master/.editorconfig, delete the overriding .editorconfig in Rx.NET.

* Deviations for this repo.

* Use pascal case for static fields, without s_ prefix.

* Omit default accessibility modifiers.

* Prefer inferred names.

* Add indent_size = 2 for yaml files.

.editorconfig

@@ -1,79 +1,165 @@
-# EditorConfig is awesome:http://EditorConfig.org
-# From https://raw.githubusercontent.com/dotnet/roslyn/master/.editorconfig
+# editorconfig.org
 
 # top-most EditorConfig file
 root = true
 
-# Don't use tabs for indentation.
+# Default settings:
+# A newline ending every file
+# Use 4 spaces as indentation
 [*]
+insert_final_newline = true
 indent_style = space
-# (Please don't specify an indent_size here; that has too many unintended consequences.)
-
-# Code files
-[*.{cs,csx,vb,vbx}]
 indent_size = 4
 
-# Xml project files
-[*.{csproj,vbproj,vcxproj,vcxproj.filters,proj,projitems,shproj}]
+[project.json]
 indent_size = 2
 
-# Xml config files
-[*.{props,targets,ruleset,config,nuspec,resx,vsixmanifest,vsct}]
-indent_size = 2
+# C# files
+[*.cs]
+# 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
 
-# JSON files
-[*.json]
-indent_size = 2
+# Indentation preferences
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents = true
+csharp_indent_switch_labels = true
+csharp_indent_labels = one_less_than_current
 
-# 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
+# avoid this. unless absolutely 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
+# use var everywhere
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+csharp_style_var_elsewhere = true:suggestion
+
+# use language keywords instead of BCL types
 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
+# name all constant fields using PascalCase
+dotnet_naming_rule.constant_fields_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.constant_fields_should_be_pascal_case.symbols  = constant_fields
+dotnet_naming_rule.constant_fields_should_be_pascal_case.style    = pascal_case_style
+
+dotnet_naming_symbols.constant_fields.applicable_kinds   = field
+dotnet_naming_symbols.constant_fields.required_modifiers = const
+
+# name all static fields using PascalCase
+dotnet_naming_rule.static_fields_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.static_fields_should_be_pascal_case.symbols  = static_fields
+dotnet_naming_rule.static_fields_should_be_pascal_case.style    = pascal_case_style
+
+dotnet_naming_symbols.static_fields.applicable_kinds   = field
+dotnet_naming_symbols.static_fields.required_modifiers = static
+
+dotnet_naming_style.pascal_case_style.capitalization = pascal_case
+
+# internal and private fields should be _camelCase
+dotnet_naming_rule.camel_case_for_private_internal_fields.severity = suggestion
+dotnet_naming_rule.camel_case_for_private_internal_fields.symbols  = private_internal_fields
+dotnet_naming_rule.camel_case_for_private_internal_fields.style    = camel_case_underscore_style
+
+dotnet_naming_symbols.private_internal_fields.applicable_kinds = field
+dotnet_naming_symbols.private_internal_fields.applicable_accessibilities = private, internal
+
+dotnet_naming_style.camel_case_underscore_style.required_prefix = _
+dotnet_naming_style.camel_case_underscore_style.capitalization = camel_case 
+
+# Code style defaults
+dotnet_sort_system_directives_first = true
+dotnet_style_require_accessibility_modifiers = omit_if_default
+csharp_preserve_single_line_blocks = true
+csharp_preserve_single_line_statements = false
+
+# Expression-level preferences
 dotnet_style_object_initializer = true:suggestion
 dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
+dotnet_style_prefer_inferred_anonymous_type_member_names = 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]
-# Prefer "var" everywhere
-csharp_style_var_for_built_in_types = true:suggestion
-csharp_style_var_when_type_is_apparent = true:suggestion
-csharp_style_var_elsewhere = true:suggestion
-
-# Prefer method-like constructs to have a block body
+# Expression-bodied members
 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
+# Pattern matching
 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
+
+# Null checking preferences
 csharp_style_throw_expression = true:suggestion
 csharp_style_conditional_delegate_call = true:suggestion
 
-# 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
+# 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 = do_not_ignore
+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
+
+# C++ Files
+[*.{cpp,h,in}]
+curly_bracket_next_line = true
+indent_brace_style = Allman
+
+# Xml project files
+[*.{csproj,vcxproj,vcxproj.filters,proj,nativeproj,locproj}]
+indent_size = 2
+
+# Xml build files
+[*.builds]
+indent_size = 2
+
+# Yml/Yaml files
+[*.{yaml,yml}]
+indent_size = 2
+
+# Xml files
+[*.{xml,stylecop,resx,ruleset}]
+indent_size = 2
+
+# Xml config files
+[*.{props,targets,config,nuspec}]
+indent_size = 2
+
+# Shell scripts
+[*.sh]
+end_of_line = lf
+
+[*.{cmd, bat}]
+end_of_line = crlf