Conversion operators cannot convert from an interface type
A conversion operator is declared with an interface type for the parameter.
At compile time, Visual Basic considers a predefined conversion to exist from any interface to any reference type. Such a conversion might fail at run time, but the compiler cannot predict run-time results, so it allows any such conversion to compile.
Because the compiler considers this conversion to be already defined, it does not allow you to redefine it.
Error ID: BC33029
To correct this error
Remove this operator definition entirely. It is already predefined.