C# Error CS1902 – Invalid option ‘{0}’ for /debug; must be ‘portable’, ’embedded’, ‘full’ or ‘pdbonly’

C# Error

CS1902 – Invalid option ‘{0}’ for /debug; must be ‘portable’, ’embedded’, ‘full’ or ‘pdbonly’

Reason for the Error & Solution

Invalid option ‘option’ for /debug; must be full or pdbonly

An invalid option was passed to the compiler option.

The following sample generates CS1902:

// CS1902.cs  
// compile with: /debug:x  
// CS1902 expected  
class x  
{  
   public static void Main()  
   {  
   }  
}