Create spelling exclusions file

.editorconfig

@@ -8,6 +8,7 @@ root = true
 indent_style = space
 # (Please don't specify an indent_size here; that has too many unintended consequences.)
 trim_trailing_whitespace = true
+spelling_exclusion_path = SpellingExclusions.dic
 
 # Code files
 [*.{cs,csx,vb,vbx}]

Razor.sln

@@ -89,6 +89,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "build", "build", "{4CAC99E0-6ECE-4264-96C3-AF4EEE7BC9D1}"
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
+		SpellingExclusions.dic = SpellingExclusions.dic
 		eng\Versions.props = eng\Versions.props
 	EndProjectSection
 EndProject

SpellingExclusions.dic

@@ -0,0 +1 @@
+csharp