Get the execution time for .net code

using System;
using System.Diagnostics;
using System.Threading;
class ClsCalculateExectionTime
{
    public static void Main(string[] StrPriArgs)
    {
        Stopwatch ObjPriWatch= new Stopwatch();
        ObjPriWatch.Start();
       

       // Your Custom Code Start

      // Your Custom Code End

        ObjPriWatch.Stop();
        TimeSpan ObjPriSpan= ObjPriWatch.Elapsed;

    }
}