public void UpdateIndex(DatabasePlaylist list, int offset)
{
if (!ContainingListInstances.ContainsKey(list))
{
throw new ArgumentException();
}
ContainingListInstances[list] = offset;
}
public bool TryAdd(DatabasePlaylist list, int offset)
{
if (ContainingListInstances.ContainsKey(list))
{
return(false);
}
ContainingListInstances.Add(list, offset);
return(true);
}
public bool IsContainedIn(DatabasePlaylist list)
{
return(ContainingListInstances.ContainsKey(list));
}