System.Diagnostics.Stopwatch -- always remeber to use Reset

Wrong

 
        System.Diagnostics.Stopwatch s = new System.Diagnostics.Stopwatch();

        s.Start();
        for (i = 0; i < count; i++) Test1();
        s.Stop();
        Console.WriteLine("Test1: {0}", s.ElapsedMilliseconds);

        s.Start();
        for (i = 0; i < count; i++) Test2();
        s.Stop();

        Console.WriteLine("Test2: {0}", s.ElapsedMilliseconds);

Right

 
        System.Diagnostics.Stopwatch s = new System.Diagnostics.Stopwatch();

        s.Start();
        for (i = 0; i < count; i++) Test1();
        s.Stop();
        Console.WriteLine("Test1: {0}", s.ElapsedMilliseconds);

        s.Reset();

        s.Start();
        for (i = 0; i < count; i++) Test2();
        s.Stop();

        Console.WriteLine("Test2: {0}", s.ElapsedMilliseconds);

Not that *cough* I would ever make this mistake or anything, but you know... it could happen to like, a friend, or something. Ya. My friend. :)