using System.Speech.Synthesis;
 private static SpeechSynthesizer speech = new SpeechSynthesizer();

        /// <summary>
        /// read(要朗读的文字,速度,音量)
        /// </summary>
        /// <param name="read"></param>
        /// <param name="rate"></param>
        /// <param name="volume"></param>
        public static void read(string read, int rate, int volume, bool yibu = true)
        {
            try
            {
                speech.Rate = rate;//速度
                speech.Volume = volume;//音量,0-100
                speech.SpeakAsyncCancelAll();
                if (yibu)
                {
                    speech.SpeakAsync(read);//异步播放，但是要等到前面的发音完成后才会播放该发音
                }
                else
                {
                    speech.Speak(read);
                }
            }
            catch (Exception)
            {
            }
        }