public static IEnumerable<AdditionalData> LoadAdditionalDataInfo()
 {
     using (var context = new ElectronicStoreSQLiteContext())
     {
         return context.AdditionalDatas.ToList();
     }
 }
 public static void SaveData(AdditionalData data)
 {
     using (var context = new ElectronicStoreSQLiteContext())
     {
         context.AdditionalDatas.Add(data);
         context.SaveChanges();
     }
 }