C# code to run my installer.exe file in silent mode, in the background, [duplicate]

Answer 1

This is the correct answer:

ProcessStartInfo psi = new ProcessStartInfo();
psi.Arguments = "/s /v /qn /min";
psi.CreateNoWindow = true;
psi.WindowStyle = ProcessWindowStyle.Hidden;
psi.FileName = newRenamedFile;
psi.UseShellExecute = false;
Process.Start(psi);

The issue was the switches were missing the forward slashes.