ObjectCache.Set Method (CacheItem, CacheItemPolicy)
When overridden in a derived class, inserts the cache entry into the cache as a CacheItem instance, specifying information about how the entry will be evicted.
Assembly: System.Runtime.Caching (in System.Runtime.Caching.dll)
If the key for item does not exist, item is inserted as a new cache entry. If an item with a key that matches item exists, the value from item is used to update or overwrite the value of the existing cache entry.
Available since 4.0