Defines an identifier for application domains that a cache implementation can use to interact with a host environment.
Assembly: System.Runtime.Caching (in System.Runtime.Caching.dll)
A cache implementation uses this reference to obtain an identifier for the application domain. In ASP.NET, cache implementations use the application identifier to construct identifiers for cache performance counters. This provides names for performance counter instances that can be distinguished between application domains when multiple application domains are running.
Available since 4.0