Update .editorconfig

src/.editorconfig

@@ -10,14 +10,18 @@ root = true
 [*]
 indent_style = space
 end_of_line = crlf
-# (Please don't specify an indent_size here; that has too many unintended consequences.)
 
 # Code files
 [*.{cs,csx,vb,vbx,ts,js,css,less}]
 indent_size = 4
 insert_final_newline = true
 charset = utf-8-bom
 
+# Razor files
+[*.{cshtml,razor}]
+indent_size = 4
+charset = utf-8-bom
+
 # Xml project files
 [*.{csproj,vbproj,vcxproj,vcxproj.filters,proj,projitems,shproj}]
 indent_size = 4
@@ -32,6 +36,9 @@ indent_size = 4
 
 # CSharp
 [*.cs]
+dotnet_code_quality_unused_parameters = all:silent
+dotnet_code_quality.ca1822.api_surface = private
+
 dotnet_sort_system_directives_first = true
 dotnet_style_qualification_for_field = true
 dotnet_style_qualification_for_property = true
@@ -41,3 +48,4 @@ dotnet_style_qualification_for_event = true
 csharp_prefer_simple_using_statement = false:none
 csharp_style_deconstructed_variable_declaration = false:none
 csharp_style_pattern_matching_over_as_with_null_check = false:none
+csharp_style_namespace_declarations =file_scoped:suggestion