Generic extension methods
time to read 7 min | 1294 words

I was playing around with the compiler when I hit this interesting feature. I was very surprised to see that this has compiled successfully.

   1: static class Program
   2: {
   3:     static void Main(string[] args)
   4:     {
   5:         IProcesser<GZipStream> p = null;
   6:         p.HasTimeout();
   7:     }
   8: }
   9:  
  10: public static class Extensions
  11: {
  12:     public static bool HasTimeout<T>(this IProcesser<T> s)
  13:         where T : Stream
  14:     {
  15:         return s.Desitnation.CanTimeout;
  16:     }
  17: }
  18:  
  19: public interface IProcesser<TDestination>
  20:     where TDestination : Stream
  21: {
  22:     TDestination Desitnation { get; }
  23: }
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