public static void CalculateDistanceFromLatLngTest(double lat1, double lng1, double lat2, double lng2, double expectedValue)
{
var result = GeoLocation.CalculateDistanceFromLatLng(lat1, lng1, lat2, lng2);
var actualValue = Convert.ToDouble(result);
// Assert
Assert.AreEqual(expectedValue, actualValue, 1d); // Accept if distance diff is +/-1 meters.
}