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org.sonar.plugins.vbnet.S4201.html Maven / Gradle / Ivy

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