private void button2_Click(object sender, EventArgs e)
        {
            LecStudView f2 = new LecStudView("admin");

            this.Hide();
            f2.Show(this);
        }
        private void button3_Click(object sender, EventArgs e)
        {
            LecStudView f2 = new LecStudView(Password);

            this.Hide();
            f2.Show(this);
        }