Assembly: System.Web (in system.web.dll)
The HttpApplicationState class performs automatic locking and unlocking with the AllKeys and Count properties and the Add, Clear, Get, GetKey, Remove, RemoveAt and Set methods. However, explicitly using the Lock and UnLock methods when you have a series of operations may be more efficient.
The following example uses the Lock method and UnLock method to prevent other sessions from changing the value of two application variables until after the local session has changed them.
Application.Lock(); Application["MyCode"] = 21; Application["MyCount"] = Convert.ToInt32(Application["MyCount"]) + 1; Application.UnLock();
get_Application().Lock(); get_Application().set_Item("MyCode", new Integer(21)); get_Application().set_Item("MyCount", System.Convert.ToString( Convert.ToInt32(get_Application().get_Item("MyCount")) + 1)); get_Application().UnLock();
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.