/// <summary>
/// Initializes a new instance of the <see cref="ExportableAudioFile"/> class from an existing
/// <see cref="AudioFile"/>.
/// </summary>
/// <param name="audioFile">The audio file to copy.</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="audioFile"/> is null.</exception>
public ExportableAudioFile(AudioFile audioFile)
: base(audioFile)
{
Contract.Requires <ArgumentNullException>(audioFile != null);
}
