Change System Datetime Format programmatically

         //Set Dateformat for the system

            string strCurCulture = System.Threading.Thread.CurrentThread.CurrentCulture.Name;

            System.Globalization.CultureInfo culNew = new System.Globalization.CultureInfo(strCurCulture);

            culNew.DateTimeFormat.ShortDatePattern = "MM/dd/yyyy";

            culNew.DateTimeFormat.DateSeparator = "/";

            System.Threading.Thread.CurrentThread.CurrentCulture = culNew;

            System.Threading.Thread.CurrentThread.CurrentUICulture = culNew;