You can use Process
to execute commands from c# program
Try This:
Process process = new Process();
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.FileName = "arp";
startInfo.Arguments = "-g";
startInfo.RedirectStandardOutput = true;
startInfo.UseShellExecute = false;
process.StartInfo = startInfo;
process.Start();
String strData = process.StandardOutput.ReadToEnd();