comando findstr en c#

[subero]

StringBuilder sb = new StringBuilder();
sb.Append("hora del sistema: " + DateTime.Now.ToString("hh:mm:ss") +Environment.NewLine);

Process myProcess = new Process();

ProcessStartInfo myProcessStartInfo = new ProcessStartInfo("findstr"," /s \"ou\" c:\ *.txt "); // ME DA ERROR

myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
myProcess.StartInfo.CreateNoWindow = true;
myProcessStartInfo.UseShellExecute = false;
myProcessStartInfo.RedirectStandardOutput = true;

myProcess.StartInfo = myProcessStartInfo;
myProcess.Start();
string output = myProcess.StandardOutput.ReadToEnd();
myProcess.Close();
return (output);
Esa salida no me genera nada en ese direccion