public static async Task<RoutePoiToPoi> GetPoiToPoiRoute(string poi_from,string poi_to)
{
RequestPoiToPoi r = new RequestPoiToPoi();
r.access_token = "api_tester";
r.pois_from = poi_from;
r.pois_to = poi_to;
var response = await AnyPlaceClient.PostAsJsonAsync(new Uri(ServerBaseUri, "anyplace/navigation/route"), r);
var buildings = await response.Content.ReadAsAsync<RoutePoiToPoi>();
IsDirty = true;
return buildings;
}