One more try to put a Hash behind the C in the title header in README.md

Author: swijnands

dotnet/README.md

@@ -4,7 +4,7 @@ This is the .NET implementation of [referer-parser] [referer-parser], the librar
 
 The implementation uses the shared 'database' of known referers found in [`referers.yml`] [referers-yml].
 
-## C \#
+## C\# 
 
 ### Usage