errors/cs1644-11.cs

   1 // CS1644: Feature `nullable types' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead
   2 // Line: 9
   3 // Compiler options: -langversion:ISO-1
   4
   5 public class Test
   6 {
   7         static void Main ()
   8         {
   9                 bool? testbool;
  10         }
  11 }