/// <summary>
/// Removes the <see cref="T:System.Collections.Generic.IList`1"></see> item at the specified index.
/// </summary>
/// <param name="index">The zero-based index of the item to remove.</param>
/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.IList`1"></see> is read-only.</exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">index is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"></see>.</exception>
public void RemoveAt(int index)
{
DoublyLinkedListNode <T> nodeToRemove = _NodeAt(index);
if (nodeToRemove != null)
{
DoublyLinkedListNode <T> nextNode = nodeToRemove.Next;
DoublyLinkedListNode <T> previousNode = nodeToRemove.Previous;
if (previousNode != null)
{
previousNode.Next = nextNode;
}
if (nextNode != null)
{
nextNode.Previous = previousNode;
}
}
}
/// <summary>
/// Removes all items from the <see cref="T:System.Collections.Generic.ICollection`1"></see>.
/// </summary>
/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"></see> is read-only. </exception>
public void Clear( )
{
_firstNode = null;
_lastNode = null;
}