C# узнать скорость копирования

using System;
using System.IO;
using System.Diagnostics;
 
namespace SpeedTest
{
    public class testFileCopySpeed
    {
        public int Get(string sourceFile, string destinationFile)
        {
            Stopwatch testStopwatch = new Stopwatch();
            testStopwatch.Start();
 
            File.Copy(sourceFile, destinationFile, true);
 
            testStopwatch.Stop();
 
            FileInfo someFileInfo = new FileInfo(destinationFile);
            long fileByteSize = someFileInfo.Length;
 
            File.Delete(destinationFile);
 
            return (int)((Convert.ToDouble(someFileInfo.Length) /
                        (Convert.ToDouble(testStopwatch.ElapsedMilliseconds) / 1000))
                        / 1024);
        }
    }
}