private static void ImportTelescopes()
        {
            string jsonFile   = File.ReadAllText("../../../Resources/telescopes.json");
            var    telescopes = JsonConvert.DeserializeObject <IEnumerable <TelescopeDto> >(jsonFile);

            foreach (var telescopeDto in telescopes)
            {
                if (telescopeDto.Name == null ||
                    telescopeDto.MirrorDiameter == null ||
                    telescopeDto.MirrorDiameter <= 0 ||
                    telescopeDto.Location == null)
                {
                    Printer.PrintError();
                    continue;
                }
                QueryMethods.AddTelescope(telescopeDto);
            }
        }