Unlocks access to an HttpApplicationState variable to facilitate access synchronization.
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 methods when you have a series of operations may be more efficient.
The following example uses the Lock method and method to prevent other sessions from changing the value of two application variables until after the local session has changed them.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.