public void LatLngDistanceKm() { const double Lat1 = 1; const double Lng1 = 1; const double Lat2 = 2; const double Lng2 = 2; var ll1 = new LatLng(Lat1, Lng1); var ll2 = new LatLng(Lat2, Lng2); var expected = 157.2; Assert.AreEqual(expected, ll1.Distance(ll2), 0.1); }