Update EditorConfig and Git files

- Add default Git attributes.
- Update Git ignores to latest.
- Merge duplicate EditorConfig rules.
- Format projects to EditorConfig rules.
- Fix formatting errors in 'Guard.md' file.

Author: Nirmal4G

.editorconfig

@@ -17,17 +17,6 @@ indent_style = space
 # New line preferences
 end_of_line = unset
 insert_final_newline = false
-dotnet_style_prefer_is_null_check_over_reference_equality_method = true:warning
-dotnet_style_readonly_field = true:warning
-dotnet_style_predefined_type_for_locals_parameters_members = true:warning
-dotnet_style_predefined_type_for_member_access = true:warning
-dotnet_style_require_accessibility_modifiers = for_non_interface_members:warning
-dotnet_style_allow_statement_immediately_after_block_experimental = false:warning
-dotnet_style_allow_multiple_blank_lines_experimental = false:warning
-dotnet_style_qualification_for_field = true:warning
-dotnet_style_qualification_for_property = false:warning
-dotnet_style_qualification_for_method = false:warning
-dotnet_style_qualification_for_event = false:warning
 
 #### Build files ####
 
@@ -58,14 +47,14 @@ insert_final_newline = true
 #### .NET Coding Conventions ####
 
 # this. and Me. preferences
-dotnet_style_qualification_for_event = true:silent
-dotnet_style_qualification_for_field = true:silent
-dotnet_style_qualification_for_method = true:silent
-dotnet_style_qualification_for_property = true:silent
+dotnet_style_qualification_for_event = false:warning
+dotnet_style_qualification_for_field = true:warning
+dotnet_style_qualification_for_method = false:warning
+dotnet_style_qualification_for_property = false:warning
 
 # Language keywords vs BCL types preferences
-dotnet_style_predefined_type_for_locals_parameters_members = true:silent
-dotnet_style_predefined_type_for_member_access = true:silent
+dotnet_style_predefined_type_for_locals_parameters_members = true:warning
+dotnet_style_predefined_type_for_member_access = true:warning
 
 # Parentheses preferences
 dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity:silent
@@ -74,7 +63,11 @@ dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent
 dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:silent
 
 # Modifier preferences
-dotnet_style_require_accessibility_modifiers = for_non_interface_members:silent
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:warning
+
+# Code block preferences
+dotnet_style_allow_multiple_blank_lines_experimental = false:warning
+dotnet_style_allow_statement_immediately_after_block_experimental = false:warning
 
 # Expression-level preferences
 csharp_style_deconstructed_variable_declaration = true:suggestion
@@ -90,10 +83,10 @@ dotnet_style_prefer_conditional_expression_over_assignment = true:silent
 dotnet_style_prefer_conditional_expression_over_return = true:silent
 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_is_null_check_over_reference_equality_method = true:warning
 
 # Field preferences
-dotnet_style_readonly_field = true:suggestion
+dotnet_style_readonly_field = true:warning
 
 #### C# Coding Conventions ####
 
@@ -112,6 +105,7 @@ csharp_style_expression_bodied_operators = false:silent
 csharp_style_expression_bodied_properties = false:silent
 
 # Pattern matching preferences
+csharp_style_prefer_pattern_matching = true:suggestion
 csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
 csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
 
@@ -123,9 +117,15 @@ csharp_preferred_modifier_order = public,private,protected,internal,static,exter
 
 # Code-block preferences
 csharp_prefer_braces = true:suggestion
+csharp_using_directive_placement = outside_namespace:warning
+csharp_style_namespace_declarations = file_scoped:warning
+csharp_style_unused_value_assignment_preference = discard_variable:warning
+csharp_style_unused_value_expression_statement_preference = discard_variable:warning
+csharp_style_allow_blank_lines_between_consecutive_braces_experimental = false:warning
 
 # Expression-level preferences
 csharp_prefer_simple_default_expression = true:suggestion
+csharp_prefer_static_local_function = true:warning
 csharp_style_pattern_local_over_anonymous_function = true:warning
 
 #### C# Formatting Rules ####
@@ -381,10 +381,3 @@ dotnet_diagnostic.SA1629.severity = none
 dotnet_diagnostic.SA1633.severity = none
 dotnet_diagnostic.SA1634.severity = none
 dotnet_diagnostic.SA1652.severity = none
-csharp_using_directive_placement = outside_namespace:warning
-csharp_style_unused_value_assignment_preference = discard_variable:warning
-csharp_style_unused_value_expression_statement_preference = discard_variable:warning
-csharp_prefer_static_local_function = true:warning
-csharp_style_allow_blank_lines_between_consecutive_braces_experimental = false:warning
-csharp_style_prefer_pattern_matching = true:suggestion
-csharp_style_namespace_declarations = file_scoped:warning

.gitattributes

@@ -1,63 +1,50 @@
-###############################################################################
-# Set default behavior to automatically normalize line endings.
-###############################################################################
+# Set default file-type attributes
+
+# All file types
 * text=auto
 
-###############################################################################
-# Set default behavior for command prompt diff.
-#
-# This is need for earlier builds of msysgit that does not have it on by
-# default for csharp files.
-# Note: This is only used by command line
-###############################################################################
-#*.cs     diff=csharp
-
-###############################################################################
-# Set the merge driver for project and solution files
-#
-# Merging from the command prompt will add diff markers to the files if there
-# are conflicts (Merging from VS is not affected by the settings below, in VS
-# the diff markers are never inserted). Diff markers may cause the following
-# file extensions to fail to load in VS. An alternative would be to treat
-# these files as binary and thus will always conflict and require user
-# intervention with every merge. To do so, just uncomment the entries below
-###############################################################################
-#*.sln       merge=binary
-#*.csproj    merge=binary
-#*.vbproj    merge=binary
-#*.vcxproj   merge=binary
-#*.vcproj    merge=binary
-#*.dbproj    merge=binary
-#*.fsproj    merge=binary
-#*.lsproj    merge=binary
-#*.wixproj   merge=binary
-#*.modelproj merge=binary
-#*.sqlproj   merge=binary
-#*.wwaproj   merge=binary
-
-###############################################################################
-# behavior for image files
-#
-# image files are treated as binary by default.
-###############################################################################
-#*.jpg   binary
-#*.png   binary
-#*.gif   binary
-
-###############################################################################
-# diff behavior for common document formats
-#
-# Convert binary document formats to text before diffing them. This feature
-# is only available from the command line. Turn it on by uncommenting the
-# entries below.
-###############################################################################
-#*.doc   diff=astextplain
-#*.DOC   diff=astextplain
-#*.docx  diff=astextplain
-#*.DOCX  diff=astextplain
-#*.dot   diff=astextplain
-#*.DOT   diff=astextplain
-#*.pdf   diff=astextplain
-#*.PDF   diff=astextplain
-#*.rtf   diff=astextplain
-#*.RTF   diff=astextplain
+# Markups
+*.md   text=auto diff=markdown
+*.mdx  text=auto diff=markdown
+
+# Solutions
+*.sln   text=auto eol=crlf
+*.slnx  text=auto
+
+# Projects
+*.*proj    text=auto
+*.tasks    text=auto
+*.props    text=auto
+*.targets  text=auto
+
+# Sources
+*.cs    text=auto diff=csharp
+*.csx   text=auto diff=csharp
+*.resx  text=auto
+
+# Scripts
+*.in   text eol=lf
+*.sh   text eol=lf
+*.bat  text eol=crlf
+*.cmd  text eol=crlf
+
+# Images
+*.png  binary
+*.jpg  binary
+*.gif  binary
+
+# Keys
+*.snk  binary
+*.pfx  binary
+*.cer  binary
+
+# Others
+
+# Preserve Line endings in diff and patch files
+*.diff   -text
+*.patch  -text
+
+# Exclude git meta files from exporting
+.gitattributes export-ignore
+.gitignore     export-ignore
+.gitkeep       export-ignore