static void Main(string[] args)
{
    //取得當前工作目錄的完整限定路徑
    string currentWorkDir = Environment.CurrentDirectory;
    //silk文件完全路徑
    string silkFilePath = Path.Combine(currentWorkDir, "silk", "silk_v3_decoder.exe");
    //lame文件完全路徑
    string lameFilePath = Path.Combine(currentWorkDir, "silk", "lame.exe");
    //amr文件完全路徑
    string amrFilePath = Path.Combine(currentWorkDir, "amr", "msg.amr");
    //pcm文件完全路徑
    string pcmFilePath = Path.Combine(currentWorkDir, "amr", "msg.pcm");
    //mp3文件路徑
    string mp3FilePath = Path.Combine(currentWorkDir, "amr", DateTime.Now.ToString("yyyyMMddHHmmss") + ".mp3");
 
    //先生成pcm文件
    CmdHelper.ExecuteCmd(lamePath + "silk_v3_decoder.exe ", amrFilePath + " " + pcmFilePath);
    //生成mp3文件
    CmdHelper.ExecuteCmd(lamePath + "lame.exe", " -r -s 24000 --preset voice " + pcmFilePath + " " + mp3FilePath);
 
    //刪除臨時pcm文件
    if (File.Exists(pcmFilePath))
    {
        File.Delete(pcmFilePath);
    }
 
    Console.WriteLine("Hello World!");
    Console.ReadKey();
}
 
/// <summary>  
/// 執行CMD命令返回信息  
/// </summary>  
/// <param name="Command">命令</param>  
/// <returns>返回命令執行結果</returns>  
public static void ExecuteCmd(string fileName, string arg)
{
    //創建一個ProcessStartInfo對象 使用系統shell 指定命令和參數 設置標準輸出
    var psi = new ProcessStartInfo(fileName, arg) { RedirectStandardOutput = true };
    //var psi = new ProcessStartInfo(Command) { RedirectStandardOutput = true };
    psi.UseShellExecute = false;
    //啟動
    var proc = Process.Start(psi);
    if (proc == null)
    {
        Console.WriteLine("Can not exec.");
    }
    else
    {
        //開始讀取
        using (var sr = proc.StandardOutput)
        {
            while (!sr.EndOfStream)
            {
                Console.WriteLine(sr.ReadLine());
            }
 
            if (!proc.HasExited)
            {
                proc.Kill();
            }
        }
    }
}