private void button3_Click(object sender, EventArgs e)
        {
            this.Close();
            EditItem e_item = new EditItem();

            e_item.ShowDialog();
        }
        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Class1.Item_Id        = int.Parse(textBox12.Text);
            Class1.Click_edititem = 1;
            EditItem edit = new EditItem();

            edit.ShowDialog();
        }