Silverlight compatible version of https://gist.github.com/460096

AgCodeTimer.cs

    public class CodeTimer : IDisposable
    {
        readonly string message;
        readonly DateTime start;
        public CodeTimer(string message)
        {
            this.message = message;
            start = DateTime.UtcNow;
        }

        public void Dispose()
        {
            DateTime end = DateTime.UtcNow;
            Debug.WriteLine("{0} took {1} msec", message, (end - start).TotalMilliseconds);
        }
    }