private void nguyênMẫuToolStripMenuItem_Click(object sender, EventArgs e)
{
if (phuongtien == null || phuongtien.IsDisposed)
{
phuongtien = new FrmPhuongTien();
}
phuongtien.ShowDialog();
}
private void danhSáchCácPhươngTiệnToolStripMenuItem_Click(object sender, EventArgs e)
{
FrmPhuongTien phuongtien = new FrmPhuongTien();
phuongtien.Show();
}
