WBList class

Initialize Tree

- Clear()
- Initialize(IEnumerable<T> items)

Get/Remove Items

- GetItems()
- GetItemsDescending()

By Index:
- GetItems(int startIndex, int endIndex)
- GetItemsDescending(int startIndex, int endIndex)
- RemoveItems(int startIndex, int endIndex)

Get/Remove Node

- GetFirst()
- GetLast()
- RemoveFirst()
- RemoveLast()

By Index:
- GetAt(int index)
- RemoveAt(int index)

- this[int index]

Insert Item(s)

- Insert(int index, T item)
- Prepend(T item)
- Add(T item)

Plural:
- InsertItems(int index, IEnumerable<T> items)
- PrependItems(IEnumerable<T> items)
- AddItems(IEnumerable<T> items)

Not Implemented

- SetItems(IEnumerable<KeyValuePair<int, T>> items)