C# : concatenate 2 MP3 files

Question

I tried to concatenate 2 MP3 files using the code below. I got a new file which I can play the first half of (complete first file), but the second half is silent. The length

Answer 1

As all knows, the Mp3 files are just some frames and you can concatenate the streams together:

public static void Concatenate(params string[] mp3filenames)
{
    Stream w = File.OpenWrite("D:\\out.mp3");

    foreach (string filename in mp3filenames)
        File.OpenRead(filename).CopyTo(w);    

    w.Flush();
    w.Close();
}

and hears the usage:

Concatenate("D:\\1.mp3", "D:\\2.mp3");