c#: Finding Bugs: if(false)

Question

I've just found a bug in my program (after some amount of debugging and tearing my hair)

bool first = true;

foreach (RdAbstractNode node in listNodes)
{
    if (!first)
    {
        // do stuff (does not change first)
    }
    // do more stuff (does not change first)
}

As you can see firstis always true - never changed. So if(!first) is basically if(false).
The compiler did not generate a warning although it is set to level 4 (highest level).

How can I find similar if(false) errors?

I'm using VS 2010, .Net 4.0 compiler, project setting .Net 2.0

Answer 1

With Resharper you'll get warnings like this

Answer 2

I don't know of a compiler feature that will help you - you need unit tests.