private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            this.Hide();
            Login_Form login = new Login_Form();

            login.Show();
        }
        private void label6_Click(object sender, EventArgs e)
        {
            this.Close();
            Login_Form loginForm = new Login_Form();

            loginForm.Show();
        }