public int CompareTo(Buch buch)
{
if (buch == null)
{
return(1);
}
return(Titel.CompareTo(buch.Titel));
}
//Q10
public int CompareTo(object obj)
{
int result;
Song song = obj as Song;
result = Artist.CompareTo(song.Artist);
if (result == 0)
{
result = Titel.CompareTo(song.Titel);
}
return(result);
}
public int CompareTo(object obj)
{
if (obj == null)
{
return(1);
}
Item item = obj as Item;
if (item == null)
{
return(1);
}
return(Titel.CompareTo(item.Titel));
}
