Queue< T >

Generic Collection classes includes Queue< T >, where < T > specifies the dataType of items that will be contained in the queue.

MSDN Reference

Objects stored in a Queue are inserted at one end and removed from the other. Queues and stacks are useful when you need temporary storage for information; that is, when you might want to discard an element after retrieving its value. Use Queue if you need to access the information in the same order that it is stored in the collection. Use Stack if you need to access the information in reverse order

A queue operates in a first-in, first-out (FIFO) manner. A queue is a specialized data structure that supports adding and removing items using this FIFO access methodology.