public void AddTrack(Entities.Track t)
{
var existing = (from trk in _tracks where trk.SourceFile == t.SourceFile && trk.Name == t.Name && trk.TrackDate == t.TrackDate select t).FirstOrDefault();
if (existing == null)
{
t.TrackID = ++_maxId;
t.SetDataLoader(this);
_tracks.Add(t);
SaveData(t);
}
if (!File.Exists(GetTrackFilename(t)))
File.WriteAllText(GetTrackFilename(t), t.Data);
}