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MemoryCache.Add Method (CacheItem, CacheItemPolicy)

.NET Framework 4.5

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

Namespace:  System.Runtime.Caching
Assembly:  System.Runtime.Caching (in System.Runtime.Caching.dll)

public override bool Add(
	CacheItem item,
	CacheItemPolicy policy
)

Parameters

item
Type: System.Runtime.Caching.CacheItem

The object to add.

policy
Type: System.Runtime.Caching.CacheItemPolicy

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

Return Value

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

Caution noteCaution

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.

.NET Framework

Supported in: 4.5

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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