Make Scintilla.NET compatible with C# 7.3

.editorconfig

@@ -5,6 +5,7 @@ root = true
 [*]
 indent_style = space
 indent_size = 4
+tab_width = 4
 insert_final_newline = true
 trim_trailing_whitespace = false
 
@@ -33,8 +34,7 @@ indent_size = 2
 [[Aa]pp.{config,manifest}]
 indent_size = 2
 
-# C# files
-[*.cs]
+[*]
 
 #### .NET Coding Conventions ####
 
@@ -44,63 +44,108 @@ dotnet_sort_system_directives_first = true
 file_header_template = unset
 
 # this. and Me. preferences
-dotnet_style_qualification_for_event = false
-dotnet_style_qualification_for_field = true
-dotnet_style_qualification_for_method = false
-dotnet_style_qualification_for_property = false
+dotnet_style_qualification_for_event = false:silent
+dotnet_style_qualification_for_field = true:silent
+dotnet_style_qualification_for_method = false:silent
+dotnet_style_qualification_for_property = false:silent
 
 # Language keywords vs BCL types preferences
-dotnet_style_predefined_type_for_locals_parameters_members = true
-dotnet_style_predefined_type_for_member_access = true
+dotnet_style_predefined_type_for_locals_parameters_members = true:silent
+dotnet_style_predefined_type_for_member_access = true:silent
 
 # Parentheses preferences
-dotnet_style_parentheses_in_arithmetic_binary_operators = never_if_unnecessary
-dotnet_style_parentheses_in_other_binary_operators = never_if_unnecessary
-dotnet_style_parentheses_in_other_operators = never_if_unnecessary
-dotnet_style_parentheses_in_relational_binary_operators = never_if_unnecessary
+dotnet_style_parentheses_in_arithmetic_binary_operators = never_if_unnecessary:silent
+dotnet_style_parentheses_in_other_binary_operators = never_if_unnecessary:silent
+dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent
+dotnet_style_parentheses_in_relational_binary_operators = never_if_unnecessary:silent
 
 # Modifier preferences
-dotnet_style_require_accessibility_modifiers = for_non_interface_members
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:silent
 
 # Expression-level preferences
-dotnet_style_coalesce_expression = true:suggestion
-dotnet_style_collection_initializer = true
-dotnet_style_explicit_tuple_names = true
-dotnet_style_namespace_match_folder = true
+dotnet_style_coalesce_expression = false:silent
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_namespace_match_folder = true:suggestion
 dotnet_style_null_propagation = true:suggestion
 dotnet_style_object_initializer = true:suggestion
 dotnet_style_operator_placement_when_wrapping = beginning_of_line
 dotnet_style_prefer_auto_properties = true:silent
-dotnet_style_prefer_collection_expression = when_types_loosely_match
-dotnet_style_prefer_compound_assignment = true
-dotnet_style_prefer_conditional_expression_over_assignment = true
-dotnet_style_prefer_conditional_expression_over_return = true
+dotnet_style_prefer_collection_expression = never:suggestion
+dotnet_style_prefer_compound_assignment = true:suggestion
+dotnet_style_prefer_conditional_expression_over_assignment = true:silent
+dotnet_style_prefer_conditional_expression_over_return = true:silent
 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_inferred_anonymous_type_member_names = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
 dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
-dotnet_style_prefer_simplified_boolean_expressions = true
-dotnet_style_prefer_simplified_interpolation = true
+dotnet_style_prefer_simplified_boolean_expressions = true:suggestion
+dotnet_style_prefer_simplified_interpolation = true:suggestion
 
 # Field preferences
-dotnet_style_readonly_field = true
+dotnet_style_readonly_field = true:suggestion
 
 # Parameter preferences
-dotnet_code_quality_unused_parameters = non_public
+dotnet_code_quality_unused_parameters = non_public:suggestion
 
 # Suppression preferences
 dotnet_remove_unnecessary_suppression_exclusions = none
 
 # New line preferences
-dotnet_style_allow_multiple_blank_lines_experimental = false
-dotnet_style_allow_statement_immediately_after_block_experimental = false
+dotnet_style_allow_multiple_blank_lines_experimental = false:silent
+dotnet_style_allow_statement_immediately_after_block_experimental = false:silent
+
+#### Naming styles ####
+
+# Naming rules
+
+dotnet_naming_rule.interface_should_be_begins_with_i.severity = suggestion
+dotnet_naming_rule.interface_should_be_begins_with_i.symbols = interface
+dotnet_naming_rule.interface_should_be_begins_with_i.style = begins_with_i
+
+dotnet_naming_rule.types_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.types_should_be_pascal_case.symbols = types
+dotnet_naming_rule.types_should_be_pascal_case.style = pascal_case
+
+dotnet_naming_rule.non_field_members_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.non_field_members_should_be_pascal_case.symbols = non_field_members
+dotnet_naming_rule.non_field_members_should_be_pascal_case.style = pascal_case
+
+# Symbol specifications
+
+dotnet_naming_symbols.interface.applicable_kinds = interface
+dotnet_naming_symbols.interface.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.interface.required_modifiers = 
+
+dotnet_naming_symbols.types.applicable_kinds = class, struct, interface, enum
+dotnet_naming_symbols.types.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.types.required_modifiers = 
+
+dotnet_naming_symbols.non_field_members.applicable_kinds = property, event, method
+dotnet_naming_symbols.non_field_members.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.non_field_members.required_modifiers = 
+
+# Naming styles
+
+dotnet_naming_style.pascal_case.required_prefix = 
+dotnet_naming_style.pascal_case.required_suffix = 
+dotnet_naming_style.pascal_case.word_separator = 
+dotnet_naming_style.pascal_case.capitalization = pascal_case
+
+dotnet_naming_style.begins_with_i.required_prefix = I
+dotnet_naming_style.begins_with_i.required_suffix = 
+dotnet_naming_style.begins_with_i.word_separator = 
+dotnet_naming_style.begins_with_i.capitalization = pascal_case
+
+# C# files
+[*.cs]
 
 #### C# Coding Conventions ####
 
 # var preferences
-csharp_style_var_elsewhere = false
-csharp_style_var_for_built_in_types = false
-csharp_style_var_when_type_is_apparent = true
+csharp_style_var_elsewhere = false:silent
+csharp_style_var_for_built_in_types = false:silent
+csharp_style_var_when_type_is_apparent = true:silent
 
 # Expression-bodied members
 csharp_style_expression_bodied_accessors = when_on_single_line:silent
@@ -113,54 +158,54 @@ csharp_style_expression_bodied_operators = when_on_single_line:silent
 csharp_style_expression_bodied_properties = when_on_single_line:silent
 
 # 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
-csharp_style_prefer_switch_expression = false
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_prefer_extended_property_pattern = true:suggestion
+csharp_style_prefer_not_pattern = false:suggestion
+csharp_style_prefer_pattern_matching = false:silent
+csharp_style_prefer_switch_expression = false:suggestion
 
 # Null-checking preferences
-csharp_style_conditional_delegate_call = true
+csharp_style_conditional_delegate_call = true:suggestion
 
 # Modifier preferences
-csharp_prefer_static_local_function = true
+csharp_prefer_static_local_function = true:suggestion
 csharp_preferred_modifier_order = public,private,protected,internal,file,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,required,volatile,async
-csharp_style_prefer_readonly_struct = true
-csharp_style_prefer_readonly_struct_member = true
+csharp_style_prefer_readonly_struct = true:suggestion
+csharp_style_prefer_readonly_struct_member = true:suggestion
 
 # Code-block preferences
 csharp_prefer_braces = when_multiline:silent
-csharp_prefer_simple_using_statement = true:silent
-csharp_style_namespace_declarations = file_scoped:silent
+csharp_prefer_simple_using_statement = false:silent
+csharp_style_namespace_declarations = block_scoped:silent
 csharp_style_prefer_method_group_conversion = true:silent
-csharp_style_prefer_primary_constructors = true:suggestion
+csharp_style_prefer_primary_constructors = false:suggestion
 csharp_style_prefer_top_level_statements = false:silent
 
 # 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 = false
-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
-csharp_style_prefer_utf8_string_literals = true
-csharp_style_throw_expression = true
+csharp_prefer_simple_default_expression = true:suggestion
+csharp_style_deconstructed_variable_declaration = true:suggestion
+csharp_style_implicit_object_creation_when_type_is_apparent = false:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+csharp_style_prefer_index_operator = false:suggestion
+csharp_style_prefer_local_over_anonymous_function = true:suggestion
+csharp_style_prefer_null_check_over_type_check = true:suggestion
+csharp_style_prefer_range_operator = false:suggestion
+csharp_style_prefer_tuple_swap = true:suggestion
+csharp_style_prefer_utf8_string_literals = true:suggestion
+csharp_style_throw_expression = true:suggestion
 csharp_style_unused_value_assignment_preference = discard_variable:silent
-csharp_style_unused_value_expression_statement_preference = discard_variable
+csharp_style_unused_value_expression_statement_preference = discard_variable:silent
 
 # 'using' directive preferences
 csharp_using_directive_placement = outside_namespace:silent
 
 # New line preferences
-csharp_style_allow_blank_line_after_colon_in_constructor_initializer_experimental = true
-csharp_style_allow_blank_line_after_token_in_arrow_expression_clause_experimental = true
-csharp_style_allow_blank_line_after_token_in_conditional_expression_experimental = true
-csharp_style_allow_blank_lines_between_consecutive_braces_experimental = false
-csharp_style_allow_embedded_statements_on_same_line_experimental = false
+csharp_style_allow_blank_line_after_colon_in_constructor_initializer_experimental = true:silent
+csharp_style_allow_blank_line_after_token_in_arrow_expression_clause_experimental = true:silent
+csharp_style_allow_blank_line_after_token_in_conditional_expression_experimental = true:silent
+csharp_style_allow_blank_lines_between_consecutive_braces_experimental = false:silent
+csharp_style_allow_embedded_statements_on_same_line_experimental = false:silent
 
 #### C# Formatting Rules ####
 
@@ -208,45 +253,3 @@ csharp_space_between_square_brackets = false
 # Wrapping preferences
 csharp_preserve_single_line_blocks = true
 csharp_preserve_single_line_statements = false
-
-#### Naming styles ####
-
-# Naming rules
-
-dotnet_naming_rule.interface_should_be_begins_with_i.severity = suggestion
-dotnet_naming_rule.interface_should_be_begins_with_i.symbols = interface
-dotnet_naming_rule.interface_should_be_begins_with_i.style = begins_with_i
-
-dotnet_naming_rule.types_should_be_pascal_case.severity = suggestion
-dotnet_naming_rule.types_should_be_pascal_case.symbols = types
-dotnet_naming_rule.types_should_be_pascal_case.style = pascal_case
-
-dotnet_naming_rule.non_field_members_should_be_pascal_case.severity = suggestion
-dotnet_naming_rule.non_field_members_should_be_pascal_case.symbols = non_field_members
-dotnet_naming_rule.non_field_members_should_be_pascal_case.style = pascal_case
-
-# Symbol specifications
-
-dotnet_naming_symbols.interface.applicable_kinds = interface
-dotnet_naming_symbols.interface.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
-dotnet_naming_symbols.interface.required_modifiers = 
-
-dotnet_naming_symbols.types.applicable_kinds = class, struct, interface, enum
-dotnet_naming_symbols.types.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
-dotnet_naming_symbols.types.required_modifiers = 
-
-dotnet_naming_symbols.non_field_members.applicable_kinds = property, event, method
-dotnet_naming_symbols.non_field_members.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
-dotnet_naming_symbols.non_field_members.required_modifiers = 
-
-# Naming styles
-
-dotnet_naming_style.pascal_case.required_prefix = 
-dotnet_naming_style.pascal_case.required_suffix = 
-dotnet_naming_style.pascal_case.word_separator = 
-dotnet_naming_style.pascal_case.capitalization = pascal_case
-
-dotnet_naming_style.begins_with_i.required_prefix = I
-dotnet_naming_style.begins_with_i.required_suffix = 
-dotnet_naming_style.begins_with_i.word_separator = 
-dotnet_naming_style.begins_with_i.capitalization = pascal_case