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  1. using System;
  2.  
  3. public class Base {};
  4. public class Derived : Base {};
  5.  
  6. public static class Extensions {
  7.     public static void Foo(this Base x) { Console.WriteLine("Base.Foo"); }
  8.     public static void Foo(this Derived x) { Console.WriteLine("Derived.Foo"); }
  9. }
  10.  
  11. public static class Program {
  12.     public static void Main(string[] args) {
  13.         Base x = new Derived();
  14.         x.Foo();
  15.         (x as Derived).Foo();
  16.     }
  17. }
  18.  
Success #stdin #stdout 0.02s 34800KB
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Standard input is empty
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Base.Foo
Derived.Foo
https://ideone.com/OdpMr3
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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