application state:application state varibles are global variables for a given ASP.NET application.
1.The memory impact of storing something in application state. The memory occupied by variables stored in application state is not released until the value is either removed or replaced
2.The concurrency and synchronization implications of storing and accessing a global variable within a multithreaded server environment.
3.The scalability implications of storing and accessing a global variable within a multithreaded server environment.
4.The life-cycle implications of information stored in application state.
5.Application state is not shared across a Web farm or a Web garden.
转载于:https://www.cnblogs.com/huangwj21/archive/2011/02/21/1959920.html