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Compiler Error CS0215 

Error Message

The return type of operator True or False must be bool

User-defined true and false operators must have a return type of bool. For more information, see Overloadable Operators (C# Programming Guide).

The following sample generates CS0215:

// CS0215.cs
class MyClass
{
   public static int operator true (MyClass MyInt)   // CS0215
   // try the following line instead
   // public static bool operator true (MyClass MyInt)
   {
      return true;
   }

   public static int operator false (MyClass MyInt)   // CS0215
   // try the following line instead
   // public static bool operator false (MyClass MyInt)
   {
      return true;
   }

   public static void Main()
   {
   }
}

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