'TypeOf...Is' requires its left operand to have a reference type, but this operand has the type '<type>'
The TypeOf...Is expression checks an object variable's run-time type compatibility. This compatibility is not defined for value types.
Error ID: BC30021
To correct this error
If Option Strict is Off, use the TypeName or VarType function to obtain the variable's data type information.
If Option Strict is On, the variable declaration determines the variable's data type.
See Also
Concepts
Comparison Operators in Visual Basic
Reference
TypeName Function (Visual Basic)