//@@@@@@@@@@@@@@@ CENY @@@@@@@@@@@@@@@@@\\

        private void AddPriceBtn_Click(object sender, EventArgs e)
        {
            using (var addform = new AddEditCenyForm(null))
            {
                if (addform.ShowDialog() == DialogResult.Yes)
                {
                    GridFiller.FillPricesGrid(CenyGrid);
                }
            }
        }
        private void EditPriceBtn_Click(object sender, EventArgs e)
        {
            try
            {
                var selectedPrice = GetSelectedPrice();                 //Złapanie zaznaczonej ceny z DataGridView po ID

                using (var addform = new AddEditCenyForm(selectedPrice))
                {
                    if (addform.ShowDialog() == DialogResult.Yes)
                    {
                        GridFiller.FillPricesGrid(CenyGrid);
                    }
                }
            }
            catch (NullReferenceException exception)
            {
                MessageBox.Show(exception.Message, "Błąd", MessageBoxButtons.OK);
            }
        }