Can Task Be Scheduled by using static global Timers in ASP.NET?

See more:

C#

ASP.NET

timer

I'm using System.Timers to schedule tasks. I find this working, but I'm not quite sure if it's ok to do it this way.

using System.Web;
using System.Web.Security;
using System.Web.SessionState;
using System.Timers;
using System.IO;
using System.Threading;

namespace WebApplication1
{
    public class Global : System.Web.HttpApplication
    {
        public static System.Timers.Timer timer1 = new System.Timers.Timer();

        protected void Application_Start(object sender, EventArgs e)
        {
            timer1.Interval = 100;
            timer1.Elapsed += timer1_Elapsed;
        }

        void timer1_Elapsed(object sender, ElapsedEventArgs e)
        {
            timer1.Stop();
            // Set the time here
            // Example: 6 hours
            Thread.Sleep(6 * 60 * 60 * 1000);
            // Do something. Example:
            File.AppendAllText("C:\\log.txt", DateTime.Now + "\r\n");
        }
    }
}

By using this method, I can schedule the task anywhere in the application by calling this:

WebApplication1.Global.timer1.Start();

What do you think?