Hi @Priyanka!
The reason this is not working is probably that you are using Windows Vista or later. This is not working because you are trying to execute this from a Windows Service and not from a Windows Application. Creating a standard windows application instead of a service should solve this problem. I have mentioned a code for your reference:
ProcessStartInfo info = new ProcessStartInfo(@"c:\myprogram.exe");
info.UseShellExecute = false;
info.RedirectStandardError = true;
info.RedirectStandardInput = true;
info.RedirectStandardOutput = true;
info.CreateNoWindow = true;
info.ErrorDialog = false;
info.WindowStyle = ProcessWindowStyle.Hidden;
Process process = Process.Start(info);