WinForm 实现语音播报

public class VoiceControl
    {
        private SpeechSynthesizer synthesizer;
        private Thread speechThread;
        private bool isPlaying;

        public VoiceControl()
        {
            synthesizer = new SpeechSynthesizer();
            isPlaying = false;
        }

        /// <summary>
        /// 设置语音的速度
        /// </summary>
        /// <param name="rate">速度值，范围从-10到10</param>
        public void SetRate(int rate)
        {
            synthesizer.Rate = rate;
        }

        /// <summary>
        /// 设置语音的音量
        /// </summary>
        /// <param name="volume">音量值，范围从0到100</param>
        public void SetVolume(int volume)
        {
            synthesizer.Volume = volume;
        }

        /// <summary>
        /// 选择语音合成的声音
        /// </summary>
        /// <param name="voiceName">声音的名称</param