mcs/tests/test-anon-155.cs

   1 using System;
   2
   3 public sealed class Thing<TFirst> where TFirst : class
   4 {
   5         public static Thing<TFirst> Create<TSecond> (Func<TFirst, TSecond> fn)
   6                 where TSecond : class
   7         {
   8                 return new Thing<TFirst> (
   9                         delegate (TFirst item) {
  10                                 TSecond foo = item == null ? null : fn (item);
  11                                 Console.WriteLine (foo);
  12                         });
  13         }
  14
  15         public void SomeAction ()
  16         {
  17                 _fn (null);
  18         }
  19
  20         private Thing (Action<TFirst> fn)
  21         {
  22                 _fn = fn;
  23         }
  24
  25         Action<TFirst> _fn;
  26 }
  27
  28 public static class Program
  29 {
  30         public static void Main ()
  31         {
  32                 var foo = Thing<object>.Create (x => x);
  33                 foo.SomeAction ();
  34         }
  35 }