private static void ImportPlanets() { string jsonFile = File.ReadAllText("../../../Resources/planets.json"); var planets = JsonConvert.DeserializeObject <IEnumerable <PlanetDto> >(jsonFile); foreach (var planetDto in planets) { if (planetDto.Name == null || planetDto.StarSystem == null || planetDto.Mass <= 0 || planetDto.Mass == null) { Printer.PrintError(); continue; } QueryMethods.AddPlanet(planetDto); } }