This analyzer detects conditional statements that always evaluate to false because of a conditional statement above. A possible example is shown in the code snippet below.
In the example given above, the DoSomething() method will never be executed. To check this, apply the Combine/Split Conditional(s) refactoring to one of the if statements. The combined conditional expression condition && !condition will always be false, which means that the body of the conditional statement will never be executed.