private void printPreviewToolStripMenuItem_Click(object sender, EventArgs e)
        {
            PropertyInventory childForm = new PropertyInventory();

            childForm.MdiParent = this;
            childForm.Show();
        }
        private void metroTile8_Click_1(object sender, EventArgs e)
        {
            PropertyInventory inventory = new PropertyInventory();

            inventory.ShowDialog();
        }