private void cambiarDeUsuarioToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmLoguin loguin = new frmLoguin();

            loguin.Show();
            this.Close();
        }
        private void btnAdministrador_Click(object sender, EventArgs e)
        {
            frmLoguin logn = new frmLoguin();

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