There’s no need to null test in conjunction with an is test. null is not an instance of anything, so a null check is
redundant.
Noncompliant code example
if (x != null && x is MyClass) { ... } // Noncompliant
if (x == null || !(x is MyClass)) { ... } // Noncompliant
Compliant solution
if (x is MyClass) { ... }
if (!(x is MyClass)) { ... }
