mcs/tests/test-null-operator-22.cs

   1 class A
   2 {
   3         public A this [string arg] {
   4                 get {
   5                         return new A ();
   6                 }
   7                 set {
   8                 }
   9         }
  10
  11         public int Count (string a)
  12         {
  13                 return 1;
  14         }
  15 }
  16
  17 static class B
  18 {
  19         public static string Count (this A arg)
  20         {
  21                 return "x";
  22         }
  23 }
  24
  25 class X
  26 {
  27         public static void Main ()
  28         {
  29                 var a = new A ();
  30                 var b = a ["b"]?.Count ();
  31                 System.Console.WriteLine (b);
  32         }
  33 }