转自：C# 使用System.Speech 进行语音播报和识别 - 无网不进 - 博客园

using System.Speech.Synthesis;
 using System.Speech.Recognition;


//语音识别
SpeechRecognitionEngine recEngine = new SpeechRecognitionEngine();
SpeechSynthesizer speech = new SpeechSynthesizer();


//**************************使用System.Speech 制作文字转换成声音的程序*******************************
//rate: 范围为:-10~10;
//volume: 范围为:0~100;
//speektext: 待转换声音的文字
public void SpeechVideo_Read(int rate, int volume, string speektext)  //读
{
    speech.Rate = rate;
    speech.Volume = volume;
    speech.SpeakAsync(speektext);
}

public void SpeechVideo_Record(int rate, int volume, string recordtext)  //录音
{
    SpeechSynthesizer speech = new SpeechSynthesizer();
    speech.Rate = rate;
    speech.Volume = volume;
    SaveFileDialog sfd = new SaveFileDialog();
    sfd.Filter = "文本文件(*.wav)|*.wav|所有文件(*.*)|*.*";
    //设置默认文件类型显示顺序
    sfd.FilterIndex = 1;
    //保存对话框是否记忆上次打开的目录
    sfd.RestoreDirectory = true;
    if (sfd.ShowDialog() == DialogResult.OK)
    {
    string localfilepath = sfd.FileName.ToString();
    speech.SetOutputToWaveFile(localfilepath);
    speech.Speak(recordtext);
    speech.SetOutputToDefaultAudioDevice();
    MessageBox.Show("完成录音!", "提示");
    }
}

public void SpeechVideo_Pause()  //暂停
{
    speech.Pause();
}

public void SpeechVideo_Contine()  //暂停后继续
{
    speech.Resume();
}
//**************************************结束********************************************************




//*****************************************使用System.Speech 制作语音识别程序***********************
//rate: 范围为:-10~10;
//volume: 范围为:0~100;
//speektext: 待转换声音的文字
public void recEngine_Speech_RecordCheck()  //读
{
    Choices preCmd = new Choices();
    preCmd.Add(new string[] { "name", "age" });
    GrammarBuilder gb = new GrammarBuilder();
    gb.Append(preCmd);
    Grammar gr = new Grammar(gb);
    recEngine.LoadGrammarAsync(gr);
    recEngine.SetInputToDefaultAudioDevice();
    recEngine.RecognizeAsync(RecognizeMode.Multiple);
    recEngine.SpeechRecognized += recEngine_SpeechRecognized;
    }

public void recEngine_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
    switch (e.Result.Text)
    {
        case "name":
        MessageBox.Show("wangjin");
        break;
        case "age":
        MessageBox.Show("23");
        break;
    }
}

//**************************************结束****************************************************//

转自：C# 使用System.Speech 进行语音播报和识别 - 无网不进 - 博客园