Assembly: System.Device (in System.Device.dll)
The movement threshold does not guarantee that events will be received at the requested threshold. The platform attempts to honor requests for a particular movement threshold, but in some cases, the events will not be raised at the requested threshold.
Note In versions of Windows prior to Windows 7, the following conditions apply:
No location events will be raised.
The following diagram represents location coordinates that the location provider (for example, a GPS device) supplies to the computer. P1, in the diagram, represents the location data included in a PositionChanged event, and P2, P3, and P4 represent points within the movement threshold. So when the location provider supplies data indicating a location at those points (P1, P2, P3, and P4), no PositionChanged events are raised, and Position returns P1. The point P5 is outside of the distance, so at that point, Location is updated and a LocationChanged event is raised.