private void userToolStripMenuItem_Click(object sender, EventArgs e)
{
ManagerUser managerUser = new ManagerUser();
//managerUser.MdiParent = this;
managerUser.ShowDialog();
}
private void usersToolStripMenuItem_Click(object sender, EventArgs e)
{
ManagerUser managerUser = new ManagerUser();
managerUser.MdiParent = this;
managerUser.Show();
//panel1.Controls.Clear();
//panel1.Controls.Add(new ManageUser1());
}