Occurs when the availability of the network changes.
Assembly: System (in System.dll)
The NetworkChange class raises events when the availability of the network changes. The network is available when at least one network interface is marked "up" and is not a tunnel or loopback interface.
To have a NetworkChange object call an event-handling method when a event occurs, you must associate the method with a NetworkAvailabilityChangedEventHandler delegate, and add this delegate to this event.
The event is supported on Windows 2000 and later.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.