public void AddCatagory(string name, string shortCode, string desc)
        {
            Catagory catagory = (new Catagory(idItr++, name, shortCode, desc));

            _catagories.Add(catagory);
            fileManager.SaveData(CatagoryConverter.ConvertToString(catagory));
        }
        public void DeleteCatagory(Predicate <Catagory> query)
        {
            int numberOfElementsRemoved = _catagories.RemoveAll(query);

            if (numberOfElementsRemoved > 0)
            {
                fileManager.DeleteData(CatagoryConverter.ConvertToString(_catagories));
            }
        }