//开始录制        private void btStart_Click(object sender, RoutedEventArgs e)        {            audioStream = new MemoryStream();            microphone.BufferDuration = TimeSpan.FromMilliseconds(1000);            microphoneBuffer = new byte[microphone.GetSampleSizeInBytes(microphone.BufferDuration)];            microphone.BufferReady += microphoneBuffer_BufferReady;            microphone.Start();            blnRecording = true;        }        //停止录制        private void btStop_Click(object sender, RoutedEventArgs e)        {            if (blnRecording)            {                microphone.Stop();                microphone.BufferReady -= microphoneBuffer_BufferReady;                audioStream.Flush();                recording = audioStream.ToArray();                audioStream.Dispose();                //播放声音                var effect = new SoundEffect(recording, microphone.SampleRate, AudioChannels.Mono);                effect.Play();            }            btRecording.Visibility = Visibility.Visible;            btStart.Visibility = Visibility.Collapsed;            btStop.Visibility = Visibility.Collapsed;        }        void microphoneBuffer_BufferReady(object sender, EventArgs e)        {            microphone.GetData(microphoneBuffer);            audioStream.Write(microphoneBuffer, 0, microphoneBuffer.Length);        }

1、在Silverlight应用程序中使用XNA Game Studio，需要模拟Game循环来使我们的程序能够正常的实施。

2、定义下面的App.class XNAAsyncDispatcher类并将它添加到App()构造函数的下一行。

ApplicationLifetimeObjects.Add(new XNAAsyncDispatcher(TimeSpan.FromMilliseconds(50)));

 定义类XNAAsyncDispatcher

public class XNAAsyncDispatcher : IApplicationService    {        private DispatcherTimer _frameworkDispatcherTimer;        public XNAAsyncDispatcher(System.TimeSpan dispatchInterval)        {            FrameworkDispatcher.Update();            this._frameworkDispatcherTimer = new DispatcherTimer();            this._frameworkDispatcherTimer.Tick += new EventHandler(frameworkDispatcherTimer_Tick);            this._frameworkDispatcherTimer.Interval = dispatchInterval;        }        void IApplicationService.StartService(ApplicationServiceContext context)        {            this._frameworkDispatcherTimer.Start();        }        void IApplicationService.StopService()        {            this._frameworkDispatcherTimer.Stop();        }        void frameworkDispatcherTimer_Tick(object sender, EventArgs e)        {            FrameworkDispatcher.Update();        }    }