mcs/errors/cs9030-2.cs

   1 // CS9030: The left-hand side of an assignment cannot contain a null propagating operator
   2 // Line: 15
   3
   4 public class Test1
   5 {
   6         public class Test2
   7         {
   8                 public System.EventHandler<System.EventArgs> E;
   9         }
  10
  11         public Test2 test2 = new Test2 ();
  12
  13         static void Main ()
  14         {
  15                 new Test1 ()?.test2.E += null;
  16         }
  17 }