代码如下：

语音播报

添加引用：System.Speech.Synthesis或Microsoft.Speech.Synthesis

public static void Speaking(string saying)
        {
            string say = saying;
            Task task = new Task(() =>
            {
                SpeechSynthesizer speech = new SpeechSynthesizer();
                speech.Volume = 100; //音量
                speech.SetOutputToDefaultAudioDevice();//设定默认音频设备
                CultureInfo keyboardCulture = System.Windows.Forms.InputLanguage.CurrentInputLanguage.Culture;//获取当前输入语言的区域性
                InstalledVoice neededVoice = speech.GetInstalledVoices(keyboardCulture).FirstOrDefault();
                if (neededVoice == null)
                {
                    say = "未知的操作";
                }
                else
                {
                    speech.SelectVoice(neededVoice.VoiceInfo.Name);
                }

                string str = say + "," + say + "," + say;

                speech.SpeakAsync(str);//异步播报
            });
            task.Start();

        }

语音识别

添加引用：System.Speech.Recognition

            SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("zh-CN"));//初始化中文引擎
            Choices conmmonds = new Choices();
            conmmonds.Add(new string[] { "导通", "断开" });//添加词条
            GrammarBuilder gBuilder = new GrammarBuilder();
            gBuilder.Append(conmmonds);
            Grammar grammar = new Grammar(gBuilder);
            recognizer.LoadGrammar(grammar);
            recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(Deal_SpeechRecongized);
            recognizer.SetInputToDefaultAudioDevice();//设置默认输入设备
            recognizer.RecognizeAsync(RecognizeMode.Multiple);//开始监控设备输入准备识别

            static void Deal_SpeechRecongized(object sender, SpeechRecognizedEventArgs e) //处理识别结果
            {
                Console.WriteLine("识别结果：" + e.Result.Text);
            }

Windows7或XP系统语音播报会报BUG如图所下：

检索COM类工厂中CLSID为{D9F6EE60-58C9-458B-88E1-2F908FD7F87C}的组件失败，原因是出现以下错误：8007007e找不到指定的模块错误

解决方案：

1. 在项目引用中选中System.Speech，右键打开属性，将嵌入互操作类型及特定版本选为False，如下图所示
   1. 
2. 检查系统存不存在语音识别模块，一部分Windows7系统可能由于安装系统时去除了一部分包括语音识别功能组件，导致sapi.dll文件不存在，所以就会爆出上述错误，没有讲述人语言包。
   1. 打开控制面板，切换为小图标，正常会看到语音识别图标，而功能缺乏的系统会找不到语音识别
   2. 
   3. 如果没有则需要下载Windows7系统TTS修复，下载链接在文章底部，csdn 1积分下载，无积分上传审核不通过
   4. 需要注意的是即使下载修复软件进行修复后，控制面板中出现了语音识别图标，但运行语音识别软件后，但可能会爆出“无法创建所需的引擎ID”类似错误，这时需要将麦克风插入计算机中，然后重启软件，如果依然存在问题，说明修复未成功，Debug失败

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