Assembly: Microsoft.ApplicationServer.Caching.Core (in microsoft.applicationserver.caching.core.dll)
The DataCacheItemVersion is updated every time that the object is updated. Only the latest version of the object is stored on the cache cluster. Due to the distributed nature of the cluster, the cache client may not have the latest copy of the object. For this reason, the DataCacheItemVersion class is essential for concurrency operations. For more information, see Concurrency Models (Velocity) and Concurrency Methods (Velocity).
When using cache notifications, the DataCacheItemVersion object corresponding to an item-related cache operation can be returned to your application with the version parameter of the DataCacheNotificationCallback delegate method. For more information, see Cache Notifications (Velocity).