errors/cs0457-2.cs

   1 // cs0457: Ambiguous user defined conversions `A.implicit operator byte(A)' and `A.implicit operator sbyte(A)' when converting from 'A' to 'int'
   2 // Line: 20
   3
   4 class A
   5 {
   6         public static implicit operator ushort (A mask)
   7         {
   8                 return 1;
   9         }
  10
  11         public static implicit operator short (A mask)
  12         {
  13                 return 2;
  14         }
  15 }
  16
  17 class X
  18 {
  19     static A a = null;
  20     static object o = -a;
  21 }