C#播放音频文件的方式：
- 播放系统事件声音
- 使用System.Media.SoundPlayer播放wav
- 使用MCI Command String多媒体设备程序接口播放mp3，wav，avi等
- 使用WindowsMediaPlayer的COM组件来播放(可视化)
- 使用DirectX播放音频文件
- 使用Speech播放(朗读器，可朗读文本)
这里讲不需要引用dll就能播放音频的几种方式：
1、播放系统事件声音
System.Media.SystemSounds.Asterisk.Play(); //星号
System.Media.SystemSounds.Beep.Play(); //提示音
System.Media.SystemSounds.Exclamation.Play(); //感叹
System.Media.SystemSounds.Hand.Play(); //协助
System.Media.SystemSounds.Question.Play(); //问题2、使用MCI Command String播放音频文件，可以支持多种格式(mp3，wav，avi)，且不需要额外引用dll，可以循环播放音频
public class AudioPlayer{public AudioPlayer(){}//定义API函数使用的字符串变量 [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]private string Name = "";[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]private string durLength = "";[MarshalAs(UnmanagedType.LPTStr, SizeConst = 128)]private string TemStr = "";int ilong;//定义播放状态枚举变量public enum State{mPlaying = 1,mPuase = 2,mStop = 3};//结构变量public struct structMCI{public bool bMut;public int iDur;public int iPos;public int iVol;public int iBal;public string iName;public State state;};public structMCI mc = new structMCI();//取得播放文件属性public string FileName{get{return mc.iName;}set{try{TemStr = "";TemStr = TemStr.PadLeft(127, Convert.ToChar(" "));Name = Name.PadLeft(260, Convert.ToChar(" "));mc.iName = value;ilong = APIClass.GetShortPathName(mc.iName, Name, Name.Length);Name = GetCurrPath(Name);Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media";ilong = APIClass.mciSendString("close all", TemStr, TemStr.Length, 0);ilong = APIClass.mciSendString(Name, TemStr, TemStr.Length, 0);ilong = APIClass.mciSendString("set media time format milliseconds", TemStr, TemStr.Length, 0);mc.state = State.mStop;}catch{}}}//播放public void play(){TemStr = "";TemStr = TemStr.PadLeft(127, Convert.ToChar(" "));APIClass.mciSendString("play media", TemStr, TemStr.Length, 0); //单次播放//APIClass.mciSendString("play media repeat", TemStr, TemStr.Length, 0); //循环播放mc.state = State.mPlaying;}//停止public void StopT(){TemStr = "";TemStr = TemStr.PadLeft(128, Convert.ToChar(" "));ilong = APIClass.mciSendString("close media", TemStr, 128, 0);ilong = APIClass.mciSendString("close all", TemStr, 128, 0);mc.state = State.mStop;}public void Puase(){TemStr = "";TemStr = TemStr.PadLeft(128, Convert.ToChar(" "));ilong = APIClass.mciSendString("pause media", TemStr, TemStr.Length, 0);mc.state = State.mPuase;}private string GetCurrPath(string name){if (name.Length < 1) return "";name = name.Trim();name = name.Substring(0, name.Length - 1);return name;}//总时间public int Duration{get{durLength = "";durLength = durLength.PadLeft(128, Convert.ToChar(" "));APIClass.mciSendString("status media length", durLength, durLength.Length, 0);durLength = durLength.Trim();if (durLength == "") return 0;return (int)(Convert.ToDouble(durLength) / 1000f);}}//当前时间public int CurrentPosition{get{durLength = "";durLength = durLength.PadLeft(128, Convert.ToChar(" "));APIClass.mciSendString("status media position", durLength, durLength.Length, 0);mc.iPos = (int)(Convert.ToDouble(durLength) / 1000f);return mc.iPos;}}}public class APIClass{[DllImport("kernel32.dll", CharSet = CharSet.Auto)]public static extern int GetShortPathName(string lpszLongPath,string shortFile,int cchBuffer);[DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)]public static extern int mciSendString(string lpstrCommand,string lpstrReturnString,int uReturnLength,int hwndCallback);}其他请参考：
https://kernel.blog.csdn.net/article/details/50845805
C#播放语音和字幕实列：
https://download.csdn.net/download/lvxingzhe3/88657604
