关于使用Speech SDK 5.1过程中遇到的问题
如何使用SpeechLib 来完成一个语音识别的程序，我需要的是语音识别，而不是文字到语音转换，在网上看到了很多代码是这样写的：
  public class SpRecognition
  {
  private static SpRecognition _Instance = null;
  private SpeechLib.ISpeechRecoGrammar isrg;
  //private SpSharedRecoContextClass ssrContex = null;
  private SpSharedRecoContextClass ssrContex;
  private System.Windows.Forms.Control cDisplay; //fan:用来显示语音转化后的文本
  public System.Windows.Forms.TextBox textbox; //fan:增加textbox在SpRecognition 类
  public SpRecognition()
  {
  ssrContex = new SpSharedRecoContextClass();
  isrg = ssrContex.CreateGrammar(1);
  SpeechLib._ISpeechRecoContextEvents_RecognitionEventHandler recHandle =
  new _ISpeechRecoContextEvents_RecognitionEventHandler(ContexRecognition);
  ssrContex.Recognition += recHandle;
  }
  public void BeginRec(Control tbResult)
  {
  isrg.DictationSetState(SpeechRuleState.SGDSActive);
  cDisplay = tbResult;
  //cDisplay.Text = "dddddddddd"; 测试，可以成功在textbox1那里显示出来

  }
  public static SpRecognition instance()
  {
  if (_Instance == null)
  _Instance = new SpRecognition();
  return _Instance;
  }
  public void CloseRec()
  {
  isrg.DictationSetState(SpeechRuleState.SGDSInactive);
  }
  private void ContexRecognition(int iIndex, object obj, SpeechLib.SpeechRecognitionType type, SpeechLib.ISpeechRecoResult result)
  {
  cDisplay.Text += result.PhraseInfo.GetText(0, -1, true);
  }
  public void MessageBegin()
  {
  textbox = new TextBox();
  textbox.Text = "Notice :this time ,it Begin recoginse";
  MessageBox.Show(textbox.Text);

  }
  public void MessageEnd()
  {
  textbox = new TextBox();
  textbox.Text = "Notice :this time ,it End recoginse";
  MessageBox.Show(textbox.Text);
  }

  }
但是程序出错：Error 1 Interop type 'SpeechLib.SpSharedRecoContextClass' cannot be embedded. Use the applicable interface instead. D:\C#学习\tryreco\tryreco\Form1.cs 48 21 tryreco
 
求大神解释，为什么出错了呢？怎么解决啊？

------解决方案--------------------
如果用的是visual studio 2010, 试试在solution explorer右击SpeechLib,点属性，Embed Interop Types一项选true