public void Add(ItemEntity entity)
 {
     try
     {
         var itemData = OpenFileAndReadData(TravelInTimeConstants.ItemsDatabase).GetCollection();
         for (var i = 0; i < itemData.Count; i++)
         {
             ItemsDatabase.Add(new ItemEntity((int)itemData[i]["id"], itemData[i]["title"].ToString(),
                                              (int)itemData[i]["value"], (bool)itemData[i]["stackable"],
                                              itemData[i]["slug"].ToString()));
         }
     }
     catch (Exception e)
     {
         Debug.WriteLine("something went wrong with adding the item");
     }
 }