// #you will need the other usual using statements besides this one.
using System.Diagnostics; 

// #start a new process
Process p = new Process(); 

// #tells operating system not to use a shell;
p.StartInfo.UseShellExecute = false;        

//#need this false to capture results in stdout

//#allow me to capture stdout, i.e. results
p.StartInfo.RedirectStandardOutput = true; 

//#my command arguments, i.e. what site to ping
p.StartInfo.Arguments="www.yahoo.com"; 

//#the command to invoke under MSDOS
p.StartInfo.FileName=@"c:\ping";              

//#do not show MSDOS window
p.StartInfo.CreateNoWindow=true;            

//#do it!
p.Start();                                                 


//#capture results
string output = p.StandardOutput.ReadToEnd(); 

//#wait for all results.
p.WaitForExit();                                       


//#show results.
MessageBox.Show(output.ToString(),"result");