mcs/errors/cs0023-29.cs

   1 // CS0023: The `?' operator cannot be applied to operand of type `T'
   2 // Line: 8
   3
   4 class X
   5 {
   6         static void Bug<T>(System.Func<T> func)
   7         {
   8                 var r = func?.Invoke ();
   9         }
  10 }