CRR0005 - Expression value is always the same

• Apr 16, 2018

This analyzer detects invariant conditions. Such conditions evaluate to the same value regardless of variables they include. For instance, consider the following example.

C#

if (condition && !condition) { // CRR0005
    // ...
}

VB.NET

If condition AndAlso (Not condition) Then ' CRR0005
    ' ...
End If

To make it clear, look at the truth table of this expression.

condition	!condition	condition && !condition
True	False	False
False	True	False

As you see, the last column has the same value in each row, which means variables in this expression do not affect the result. You need to modify such expressions or change your code to avoid the condition.

In the example above, the code inside the condition will never be executed, so this block can be completely removed.