Gets or sets the capacity of the Deque. The Capacity is the number of items that this Deque can hold without expanding its internal buffer. Since Deque will automatically expand its buffer when necessary, in almost all cases it is unnecessary to worry about the capacity. However, if it is known that a Deque will contain exactly 1000 items eventually, it can slightly improve efficiency to set the capacity to 1000 up front, so that the Deque does not have to expand automatically.

Gets the number of items currently stored in the Deque. The last item in the Deque has index Count-1.

Gets or sets an item at a particular index in the Deque.