private void trangChủToolStripMenuItem_Click(object sender, EventArgs e)
{
TrangChu f = new TrangChu(_loginForm);
this.Close();
f.Show();
}
private void Login_Form_Load(object sender, EventArgs e)
{
if (isLogin == true)
{
TrangChu f = new TrangChu(this);
this.Hide();
f.Show();
}
}