พอมีใครเคยทำ C# windows service run as user เพื่อจะให้ run file .exe บ้างค่ะ

private void timer_elasped(object sender, ElapsedEventArgs e)
        {
            string application_calc = @"C:\WINDOWS\system32\calc.EXE";
            FileInfo ficalc = new FileInfo(application_calc);
            if (ficalc.Exists)
            {
                if (IsProcessOpen("calc") == false)
                {
                    if (Environment.OSVersion.Version.Major < 6)
                    {
                        Process.Start(application_calc);
                        //string sTempUser = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
                        //if (sTempUser.IndexOf("\\") != -1)
                        //{
                        //    string[] aryUser = new String[2];
                        //    char[] splitter = { '\\' };
                        //    aryUser = sTempUser.Split(splitter);
                        //    Process.Start(application_calc, aryUser[1]);
                        //    Process.Start(new System.Diagnostics.ProcessStartInfo()
                        //    {
                        //        FileName = application_calc,
                        //        UseShellExecute = true,
                        //        Verb = aryUser[1]
                        //    });
                        //}
                    }
                    else
                    {
                        Process.Start(application_calc);
                    }
                }
            }
        }