How to convert MP3 files to WAV files in .NET (C#)

I have successfully converted compressed audio to PCM files with the Alvas.Audio .NET library. Its FAQ shows how to convert a WAV to a MP3 but not the contrary. So I had to write my own code:

static void Main(string[] args) { string mp3File = @"Theme - Simpsons.mp3"; string wavFile = @"Theme - Simpsons.wav"; using (var wr = new Mp3Reader(File.OpenRead(mp3File))) { IntPtr mp3Format = wr.ReadFormat(); byte[] mp3Data = wr.ReadData(); var wavFormat = AudioCompressionManager.GetWaveFormat(mp3Format); Decode2Pcm(ref mp3Format, ref mp3Data, ref wavFormat); MemoryStream ms = new MemoryStream(); using (var output = File.OpenWrite(wavFile)) using (WaveWriter ww = new WaveWriter(output, AudioCompressionManager.FormatBytes(AudioCompressionManager.GetFormatList(wavFormat)[0].FormatHandle))) { ww.WriteData(mp3Data); } } } private static void Decode2Pcm(ref IntPtr format, ref byte[] data, ref WaveFormat wf) { IntPtr newFormat = AudioCompressionManager.GetCompatibleFormat(format, AudioCompressionManager.PcmFormatTag); byte[] buffer = AudioCompressionManager.Convert(format, newFormat, data, false); wf = AudioCompressionManager.GetWaveFormat(newFormat); format = newFormat; data = buffer; }