XNA Game Studio 3.1
Indicates whether the Xbox 360 Controller is connected.
Assembly: Microsoft.Xna.Framework (in microsoft.xna.framework.dll)
When calling GetState or GetCapabilities, check the returned structure's IsConnected property value. If the controller has been disconnected, this value will be false. When a controller is disconnected, values for its state and/or capabilities will not be valid. The controller will also not be able to receive new vibration settings.