通过NLayer和NAudio转换MP3成WAV

NuGet安装：

Install-Package NLayer.NAudioSupport

示例代码：

using Microsoft.Win32;
using NAudio.Wave;
using NLayer.NAudioSupport;
using System.Windows;

namespace NAudioDemo
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "MP3 Files (*.mp3)|*.mp3|All Files (*.*)|*.*";
            openFileDialog.FilterIndex = 1;
            if (openFileDialog.ShowDialog() == true)
            {
                var inputFileName = openFileDialog.FileName;
                var outputFileName = inputFileName.Substring(0, inputFileName.Length - 3) + "WAV";

                var builder = new Mp3FileReader.FrameDecompressorBuilder(wf => new Mp3FrameDecompressor(wf));
                using (var reader = new Mp3FileReader(inputFileName, builder))
                {
                    WaveFileWriter.CreateWaveFile(outputFileName, reader);
                }
            }
            MessageBox.Show("操作成功");
        }
    }
}