## Why is this an issue?

There’s no need to null test in conjunction with an `TypeOf ... Is` test. `Nothing` is not an instance of anything, so a null check is redundant.

### Noncompliant code example

    If (x IsNot Nothing And TypeOf x Is MyClass)
        ' ...
    End If

    If (x Is Nothing Or TypeOf x IsNot MyClass)
        ' ...
    End If

### Compliant solution

    If (TypeOf x Is MyClass)
        ' ...
    End If

    If (TypeOf x IsNot MyClass)
        ' ...
    End If