Gets a value that indicates that a cache entry has no absolute expiration.
Assembly: System.Runtime.Caching (in System.Runtime.Caching.dll)
A cache entry that is inserted into the cache with the field value set as the expiration value should never expire based on an absolute point in time. However, a cache entry with this setting can be evicted from the cache for other reasons that are determined by a particular cache implementation, such as a change-monitor event eviction caused by memory pressure.
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.