errors/cs1745.cs

   1 // CS1745: Cannot specify `System.Runtime.InteropServices.Optional' attribute on optional parameter `u'
   2 // Line: 8
   3 // Compiler options: -langversion:future
   4
   5 using System.Runtime.InteropServices;
   6
   7 public class C
   8 {
   9         public static void Test ([Optional] int u = 2)
  10         {
  11         }
  12 }