C# Collections

generic stack of objects
a list in first out structure

A stack represents a last in, first out collection (LIFO)
The principle methods for adding to and removing from are the Push and Pop methods

Clear	Method that removes all objects
Contains	Method that determines if an element exists
CopyTo	Method that copies the stack elements to an existing one-dimensional array
Count
GetEnumerator
Peek	Returns the object at the top of the stack without removing it
Pop	Methods that removes the object at the top of the stack
Push	Method that inserts an object at the top of the stack
ToArray	Copies the stack elements to a new one dimensional array

Legacy