Compiler Warning (level 1) CS1633

Unrecognized #pragma directive

The pragma used was not one of the known pragmas supported by the C# compiler. To resolve this error, use only pragmas supported.

The following sample generates CS1633:

C#

// CS1633.cs  
// compile with: /W:1  
#pragma unknown  // CS1633  
  
class C  
{  
   public static void Main()  
   {  
   }  
}