Compiler Error CS0107

More than one protection modifier

Only one access modifier (public, private, protected, or internal) is allowed on a class member, with the exception of internal protected.

The following sample generates CS0107:

// CS0107.cs
public class C
{
   private internal void f()   // CS0107, delete private or internal
   {
   }

   public static int Main()
   {
      return 1;
   }
}