private void close_btn_Click(object sender, EventArgs e)
        {
            this.Close();
            loginform lf = new loginform();

            lf.Show();
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            metroProgressBar1.ForeColor = Color.Red;
            metroProgressBar1.BackColor = Color.Transparent;



            if (metroProgressBar1.Value < 100)
            {
                metroProgressBar1.Value = metroProgressBar1.Value + 2;
            }
            else if (metroProgressBar1.Value == 100)
            {
                loginform lf = new loginform();
                lf.Show();
                this.Hide();
                timer1.Dispose();
            }
        }