C# - Quick and Easy Debugging StopWatch

Here's a quick and easy way to create a "stopwatch" object that you can put in a using() {} block as follows. I just needed something quick and dirty to dump time trial results for some of my tests, so I built this IDisposable extension class. Ya, it's simple, but sometimes that's handy:

 using(DebugStopWatch stopWatch = new DebugStopWatch()  
 {  
 }  

Here's the code:

 public class DebugStopWatch : IDisposable  
 {  
   private DateTime _start;  
    public DebugStopWatch()  
    {  
     _start = DateTime.UtcNow;  
     System.Diagnostics.Debug.WriteLine("Starting..."));  
    }  
    #region IDisposable Members  
    public void Dispose()  
    {  
     TimeSpan ts = DateTime.UtcNow.Subtract(_start);  
     System.Diagnostics.Debug.WriteLine(String.Format("Done: {1:0.00} sec", _prefix, ts.TotalSeconds));  
    }  
    #endregion  
 }