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ObjectCache.AddOrGetExisting Method (String, Object, DateTimeOffset, String)

When overridden in a derived class, inserts a cache entry into the cache, by using a key, an object for the cache entry, an absolute expiration value, and an optional region to add the cache into.

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

public abstract Object AddOrGetExisting(
	string key,
	Object value,
	DateTimeOffset absoluteExpiration,
	string regionName
)

Parameters

key
Type: System.String
A unique identifier for the cache entry.
value
Type: System.Object
The object to insert.
absoluteExpiration
Type: System.DateTimeOffset
The fixed date and time at which the cache entry will expire.
regionName
Type: System.String
Optional. A named region in the cache to which the cache entry can be added, if regions are implemented. The default value for the optional parameter is null.

Return Value

Type: System.Object
If a cache entry with the same key exists, the specified cache entry's value; otherwise, null.

This AddOrGetExisting(String, Object, DateTimeOffset, String) method overload returns an object value, not a CacheItem object.

.NET Framework

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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