'Structure' constraint cannot be specified multiple times for the same type parameter
A constraint list includes the Structure (Visual Basic) constraint more than once.
A constraint list on a type parameter can specify that the type argument passed to that type parameter must be a value type (with the Structure constraint) or must be a reference type (with the Class (Visual Basic) constraint). You cannot specify both constraints on the same type parameter, and you cannot specify either one more than once.
Error ID: BC32102
To correct this error
- Remove any redundant Structure keywords. You should have only one in the constraint list.