MSW.Collections Library for Microsoft .NET, standard and generic implementation.
Contains a fast double sided ring buffer class, can also work as a list, queue and stack. Implements all relevant interfaces and features silent or violent overflow. It is resizable, it is sortable and has been meticulously optimized for speed and use of resources.
In all, it is the only buffer/list/queue/stack you will ever need. Developing and optimizing your own version of equal quality will cost you hundred-fold (in time/resources).