Starting and stopping a process in C# .NET

I am trying towrite a simple program that has two methods, one that starts a process and one that takes down the same process. as in:

public Process StartProc(string procname)
{
    Process proc = new Process();
    proc.StartInfo.FileName = procname;
    proc.Start();
    return proc;
}

public void StopProc(Process proc)
{
    proc.Close();
}

Is it possible to do this like that?