public void Insert(IPlaylistItem item, int index)
{
if (index == 0)
{
Items.AddFirst(item);
return;
}
var temp = Items.First;
if (index > 0)
{
for (int i = 0; i < index; i++)
{
temp = temp.Next;
}
Items.AddBefore(temp, item);
return;
}
throw new IndexOutOfRangeException();
}
public void AddBefor(IPlaylistItem replacent, IPlaylistItem item)
{
Items.AddBefore(Items.Find(replacent), item);
}