Add .editorconfig

.editorconfig

@@ -0,0 +1,53 @@
+root = true
+
+[*]
+end_of_line = crlf
+charset = utf-8
+indent_style = space
+indent_size = 4
+
+[*.{json,csproj,props,targets}]
+indent_size = 2
+
+[*.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
+
+# 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
+
+# Sort using and Import directives with System.* appearing first
+dotnet_sort_system_directives_first                        = true
+
+# Avoid "this." 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             = false : suggestion
+
+# Suggest more modern language features when available
+csharp_style_pattern_matching_over_is_with_cast_check = true : none
+csharp_style_pattern_matching_over_as_with_null_check = true : none
+csharp_style_inlined_variable_declaration             = true : none
+csharp_style_throw_expression                         = true : none
+csharp_style_conditional_delegate_call                = true : none
+
+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
+
+trim_trailing_whitespace = true
+insert_final_newline = true