System.Diagnostics.Process.Start

                string cmdline = String.Format("C:\fx\firefox.exe {0}", address);
                System.Diagnostics.Process.Start(cmdline); // The system cannot find the file specified
 
I want to open a website using firefox, which is not the default browser. Anyone know how to do it? Or a better place to ask? 
 
DISREGARD MY QUESTION.... HERE'S WHAT I DID TO GET IT TO WORK.........
 
                System.Diagnostics.Process process1 = new System.Diagnostics.Process();
                process1.StartInfo.FileName = @"C:\fx\firefox.exe";             
   ...