errors/cs0626-2.cs

   1 // CS0626: `ExternClass.ExternMethod' is marked as an external but has no DllImport attribute. Consider adding a DllImport attribute to specify the external implementation
   2 // Line: 6
   3 // Compiler options: -warnaserror -warn:1
   4
   5 class ExternClass {
   6         public static extern int ExternMethod { set; }
   7 }