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  1. using System;
  2.  
  3. abstract class AbstractBase
  4. {
  5. 	public abstract void Foo();
  6. }
  7.  
  8. class Base : AbstractBase
  9. {
  10. 	public sealed override void Foo()
  11. 	{
  12. 	}
  13. }
  14.  
  15. class Derived : Base
  16. {
  17. 	public override void Foo()
  18. 	{
  19. 	}
  20. }
  21.  
  22. public class Test
  23. {
  24. 	public static void Main()
  25. 	{
  26. 	}
  27. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cs(17,30): error CS0239: `Derived.Foo()': cannot override inherited member `Base.Foo()' because it is sealed
prog.cs(10,37): (Location of the symbol related to previous error)
Compilation failed: 1 error(s), 0 warnings
stdout 
Standard output is empty
https://ideone.com/wJESAQ
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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