[Mono-list] shell comands and piping

[Rampage]

Hello everyone,
i've browsed the archive but couldn't find any information about this, 
so i hope you can help me out :)

here is my problem:
i have a method like this:

       public string StartProcess(string sProgram, string sArguments)
       {
           Process prc = new Process();
           prc.StartInfo.UseShellExecute = false;
           prc.StartInfo.FileName = sProgram;
           prc.StartInfo.Arguments = sArguments;
           prc.StartInfo.RedirectStandardOutput = true;         
           prc.Start();         
           string stdout;
           stdout = prc.StandardOutput.ReadToEnd();
           return stdout;
       }

suppose that i run it like this:
StartProcess("cat", "testfile.txt");
i would get a string containing the output from cat.
the problem comes if i want to pipe something
generally using the shell i would do
#cat testfile.txt | grep word (i know i can do grep word testfile.txt, 
but it's just for example)

is there a way to use the pipe with forked processes? couse i can't pass 
it as an argument for my program couse it wont work.

i hope you can help me out
thanks in advice.