MemoryCache.Add(CacheItem, CacheItemPolicy) Method

Definition

Inserts a cache entry into the cache as a CacheItem instance, and adds details about how the entry should be evicted.

C#
public override bool Add(System.Runtime.Caching.CacheItem item, System.Runtime.Caching.CacheItemPolicy policy);

Parameters

item
CacheItem

The object to add.

policy
CacheItemPolicy

An object that contains eviction details for the cache entry. This object provides more options for eviction than a simple absolute expiration.

Returns

true if insertion succeeded, or false if there is an already an entry in the cache that has the same key as item.

Remarks

Warning

The Add and AddOrGetExisting method overloads do not support the UpdateCallback property. Therefore, to set the UpdateCallback property for a cache entry, use the Set method overloads instead.

Applies to

Product Versions
.NET 8 (package-provided), 9 (package-provided)
.NET Framework 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1
.NET Standard 2.0 (package-provided)