public void addArtist(string name)
        {
            try
            {
                Artist veljko = new Artist("veljko");
                veljko.addAlbum(new Album("albumslika","1992"));
                db.Store(veljko);
                db.Store(new Artist(name));
            }
            catch (Exception e)
            {

                throw e;
            }
        }
 public void addAlbum(string artist, string cdName, string cdYear)
 {
     Artist a = new Artist(artist);
     IObjectSet res = db.QueryByExample(a);
     if (res.Count == 0)
     {
         a.addAlbum(new Album(cdName, cdYear));
         db.Store(a);
     }
     else
     {
         Artist art = (Artist)res.Next();
         art.addAlbum(new Album(cdName, cdYear));
         db.Store(art);
     }
 }