Compiler Error CS0238

'member' cannot be sealed because it is not an override

sealed was used on a member that was not also marked with override. For more information, see Inheritance.

The following sample generates CS0238:

// CS0238.cs  
abstract class MyClass  
{  
   public abstract void f();  
}  
  
class MyClass2 : MyClass  
{  
   public static void Main()  
   {  
   }  
  
   public sealed void f() // CS0238  
   // Try the following definition instead:  
   // public override sealed void f()  
   {  
   }  
}