.net - Howto analyze how many different code paths are in a method

Question

Is there a (preferred free) tool that can analyze how many different combinations are possible in a method? I am currently refactoring a method that has many many if/switch statments and I am curious how many possible different execution ways this method had.

Let's say I have a simple method:

public void DoSomething(bool flag1, int value)
{

    if (flag1)
    {
        if (value > 0)
        {
            Console.WriteLine("Flag1 & value > 0");
            return;
        }
        else
        {
            Console.WriteLine("Flag1 & value <= 0");
            return;
        }
    }
    elseif (value > 0 and value < 10)
    {
        Console.WriteLine("Flag1 is false and value between 0 & 10");
        return;
    }

    if (value < 0)
    {
        Console.WriteLine("Flag1 = false & value <= 0");
        return;
    }
    elseif(value = 0)
    {
        Console.WriteLine("Flag1 = false & value >= 10");
        return;
    }

    Console.WriteLine("nothing else matched");

}

there should be 6 possible ways in which the this method could be executed. I know there are tools out there that can calculate this number for me (I believe Visual Studio Ultimate can do this but unfortunately I only own a Professional version).

Maybe someone knows a good tool, that can do this.

Answer 1

What you mean is the Cyclomatic Complexity, and this calculation is already included with VS 2010, check here on MSDN.

Answer 2

I have been using a tool that can be integrated into VS2008 and VS2010. It can be found from http://www.blunck.info/ccm.html.

Answer 3

The metric you're looking for is "cyclomatic complexity." There are some free tools but I've used only the VS 2008 pro built-in metrics so I can't judge them, but it should make it easier to find them.

e.g. http://www.codeproject.com/KB/architecture/Cyclomatic_Complexity.aspx