Contains an array that receives the elements of the collection.
index
Contains the zero-based index in array where this method starts copying the collection.
Remarks
This method implements a standard collection operation. It copies
elements from this collection to the given array in order, starting at
element 0 in this collection. It places the elements into the array
starting at the given zero-based index. This method will stop copying
elements when it reaches the end of the collection or the end of the
array.