/// <summary>
/// Removes the element at the end of the update.
/// </summary>
public void Remove(T element)
{
if (list.Contains(element))
{
remove.Add(element);
}
}
/// <summary>
/// Adds the element to the list. Returns false if the element already existed and wasn't added.
/// </summary>
public bool Add(T element)
{
remove.Remove(element);
return(list.Add(element));
}