【片段】如何在C#里获得执行外部程序的事件

        static int RunProgram(string exe, params string[] args) 
        { 
                ManualResetEvent mreProcessExit = new ManualResetEvent(false); 
                ManualResetEvent mreOutputDone = new ManualResetEvent(false); 
                ManualResetEvent mreErrorDone = new ManualResetEvent(false); 
 
                ProcessStartInfo psi = new ProcessStartInfo(exe, String.Join(" ", args)); 
                psi.WorkingDirectory = Environment.CurrentDirectory; 
 
                psi.RedirectStandardError = true; 
                psi.RedirectStandardOutput = true; 
                psi.CreateNoWindow = true; 
                psi.UseShellExecute = false; 
                psi.ErrorDialog = true; 
 
                Process process = new Process(); 
                process.StartInfo = psi; 
 
                process.Exited += delegate(object o, EventArgs e) 
                { 
                        Console.WriteLine("Exited."); 
                        mreProcessExit.Set(); 
                }; 
                process.OutputDataReceived += delegate(object o, DataReceivedEventArgs e)  
                { 
                        if( e.Data != null ) 
                                Console.WriteLine("Output: {0}", e.Data);  
                        else 
                                mreOutputDone.Set();  
                }; 
                process.ErrorDataReceived += delegate(object o, DataReceivedEventArgs e) 
                { 
                        if (e.Data != null) 
                                Console.Error.WriteLine("Error: {0}", e.Data); 
                        else 
                                mreErrorDone.Set(); 
                }; 
 
                process.EnableRaisingEvents = true; 
                Console.WriteLine("Start: {0}", process.StartInfo.FileName);  
                process.Start(); 
                process.BeginErrorReadLine(); 
                process.BeginOutputReadLine(); 
 
                if (process.HasExited)  
                        mreProcessExit.Set(); 
 
                while(!WaitHandle.WaitAll(new WaitHandle[] { mreErrorDone, mreOutputDone, mreProcessExit }, 100)) 
                        continue; 
                return process.ExitCode; 
        }