Compiler Error CS0239

'member' : cannot override inherited member 'inherited member' because it is sealed

A member cannot override a sealed inherited member. For more information, see Inheritance.

The following sample generates CS0239:

// CS0239.cs  
abstract class MyClass  
{  
   public abstract void f();  
}  
  
class MyClass2 : MyClass  
{  
   public static void Main()  
   {  
   }  
  
   public override sealed void f()  
   {  
   }  
}  
  
class MyClass3 : MyClass2  
{  
   public override void f()   // CS0239  
   // Try the following definition instead:  
   // public new void f()  
   {  
   }  
}