Operator '<operatorname>' is not defined for type '<typename>'

You have attempted to use a unary operator (+, -, or Not) on a type, such as a String, for which it is not defined.

Error ID: BC30487

To correct this error

• Replace the unary operator with an appropriate operator for the expression.

See Also

Concepts

Operators and Expressions in Visual Basic

Efficient Combination of Operators

Reference

Operator Precedence in Visual Basic