CA0502
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
Unsupported language
This error occurs when the user tries to analyze an ASP.NET project that contains one or more pages or classes written in a language other than C# or Visual Basic. To fix this error, remove the file from the project or disable code analysis.