errors/cs0626-4.cs

   1 // cs0626-4.cs: Method, operator, or accessor `ExternClass.ExternMethod()' is marked external and has no attributes on it. Consider adding a DllImport attribute to specify the external implementation
   2 // Line: 6
   3 // Compiler options: -warnaserror -warn:1
   4
   5 class ExternClass {
   6         [System.Obsolete]
   7         public static extern void ExternMethod();
   8 }