Compiler Error CS0502

'member' cannot be both abstract and sealed

A class member cannot be both abstract and sealed.

The following sample generates CS0502:

C#

// CS0502.cs  
public class B  
{  
   abstract public void F();  
}  
  
public class C : B  
{  
   abstract sealed override public void F()   // CS0502  
   {  
   }  
}  
  
public class CMain  
{  
    public static void Main()  
    { }  
}