Determine the length of code programmatically [on hold]

So I was wondering if it is possible to check how many lines of code is when given a delegate. So for example lets say I have this method:

private int Foo()
{
    var @string = "string";
    var count = @string.Count();
}

The program would would return '2' because the method has 2 lines of code. I was thinking about how to do this using reflection, but I am no master with it. So at the moment I have a function that looks like this:

public static string Measure(this Action del)
{
    var timer = new Stopwatch();
    var length = // Length of the action
    timer.Start();
    del.Invoke();
    timer.Stop();
    return timer.Elapsed.TotalMilliseconds.ToString(CultureInfo.CurrentCulture);
}

And called like this:

Benchmark.Measure(() =>
{
    var @string = "string";
    var count = @string.Count();
});

So in this case length would be '2'