Provides information about a cache entry that will be removed from the cache.
Assembly: System.Runtime.Caching (in System.Runtime.Caching.dll)
Thetype exposes the following members.
|Key||Gets the unique identifier for a cache entry that is about to be removed.|
|RegionName||Gets the name of a region in the cache that contains a cache entry.|
|RemovedReason||Gets the reason that a cache entry is about to be removed from the cache.|
|Source||Gets a reference to the ObjectCache instance that contains a cache entry that is about to be removed.|
|UpdatedCacheItem||Gets or sets the value of CacheItem entry that is used to update the cache object.|
|UpdatedCacheItemPolicy||Gets or sets the cache eviction or expiration policy of the CacheItem entry that is updated.|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|Finalize||Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
The arguments in the class contain details about an entry that the cache implementation is about to remove. The arguments include a key to the cache entry, a reference to the ObjectCache instance that the entry will be removed from, a reason for the removal, and the region name in the cache that contains the entry. The constructor of the class uses these arguments to create a new instance of the class.
A object is passed to a CacheEntryUpdateCallback handler, which notifies the cache about the entry to remove.Notes to Implementers
A callback handler must notify the cache implementation whether to insert a replacement entry into the cache in place of the cache entry that is about to be removed. If you want to exchange cache entries, you must assign a value other than null to the UpdatedCacheItem property. Cache implementations will interpret a null value for the UpdatedCacheItem property as a notice that the current cache entry should be removed but not replaced.