GeoCoordinate.GetDistanceTo Method (GeoCoordinate)
Assembly: System.Device (in System.Device.dll)
The Haversine formula is used to calculate the distance. The Haversine formula accounts for the curvature of the earth, but assumes a spherical earth rather than an ellipsoid. For long distances, the Haversine formula introduces an error of less than 0.1 percent.
Altitude is not used to calculate the distance.
Available since 4.0
Windows Phone Silverlight
Available since 7.0