Measuring Elapsed Time in C# Methods

Timed.cs

public static class Timed
{
    /// <summary>
    /// Execute action then invoke reporting action with elapsed time
    /// </summary>
    /// <param name="timedAction">action to be executed and elapsed time measured</param>
    /// <param name="reportAction">action to be executed with the elapsed number of milliseconds passed as a parameter</param>
    /// <returns>number of milliseconds elapsed during timedAction</returns>
    public static long Execute(Action timedAction, Action<long> reportAction)
    {
        var stopwatch = new System.Diagnostics.Stopwatch();

        stopwatch.Start();
        timedAction();
        stopwatch.Stop();

        var elapsedMilliseconds = stopwatch.ElapsedMilliseconds;

        if (reportAction != null)
        {
            reportAction(elapsedMilliseconds);
        }

        return elapsedMilliseconds;
    }

    /// <summary>
    /// Invoke specified action and return number of milliseconds elapsed
    /// </summary>
    /// <param name="timedAction">timed action to be executed</param>
    /// <returns>number of milliseconds elapsed</returns>
    public static long Execute(Action timedAction)
    {
        return Timed.Execute(timedAction, null);
    }
}