private void btnDelete_Click(object sender, EventArgs e)
        {
            DialogResult dr = MessageBox.Show("Do you want to delete this Item permanently.", "Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question);

            if (dr == DialogResult.Yes)
            {
                mngStock.DeleteStock(Stock.ID);
                RefreshStockGrid();
                this.Dispose();
            }
        }