Process.Start(@"C:\Windows\System32\runas.exe C:\Program Files\Programm.exe /arg" , @"/savecred /user:domain\user");

 
ProcessStartInfo startInfo = new ProcessStartInfo("einprogramm.exe");
 startInfo.Verb ="runas";
startInfo.Arguments = @"Argumente inkl savecred";
Process process = new Process();
process.StartInfo = startInfo;
process.Start();

            
            ProcessStartInfo startInfo = new ProcessStartInfo();
            startInfo.Verb = @"cmd.exe";
            startInfo.Arguments = @"runas.exe /savecred /user:domain\user C:\\Program Files\\SolarWinds\\DameWare\\DWRCC.exe";
            Process process = new Process();
            process.StartInfo = startInfo;
            startInfo.ErrorDialog = true;
            process.Start();

ProcessStartInfo myProcess = new ProcessStartInfo("MeinProgramm.exe");               
myProcess.Arguments = "/q";
myProcess.UserName = "MeinBenutzername";
string pwd = "MeinPasswort";
SecureString password = new SecureString();
Array.ForEach<char>(pwd.ToCharArray(), item => password.AppendChar(item));
myProcess.Password = password;
myProcess.UseShellExecute = false;

Process p = new Process();
p.StartInfo = myProcess;
p.Start();

Process.Start("cmd.exe", @"/C runas.exe /savecred /user:" + struser + " " + "\"C:\\Program Files\\SolarWinds\\DameWare\\DWRCC.exe -c -h -m:" + strhost + "\"");