http://developers.de/blogs/damir_dobric/archive/2011/06/10/appfabric-cache-versioning-and-concurrency.aspxThis post contains a caching example which explains line by line versioning and concurrency features. In general AppFabric (both Azure and Server) caching supports optimistic and pessimistic concurrency models. Following MSDN article describes shortlyenCommunityServer 2008 SP1 (Build: 30619.63)