Why is this an issue?
Calling GetType() on a nullable object returns the underlying value type. Thus, comparing the returned Type object to
typeof(Nullable<SomeType>) doesn’t make sense. The comparison either throws an exception or the result can be known at compile
time.
Noncompliant code example
int? nullable = 42;
bool comparison = nullable.GetType() == typeof(Nullable<int>); // Noncompliant, always false
comparison = nullable.GetType() != typeof(Nullable<int>); // Noncompliant, always true
nullable = null;
comparison = nullable.GetType() != typeof(Nullable<int>); // Noncompliant, calling GetType on a null always throws an exception
