private void btnCadCombustivel_Click(object sender, EventArgs e)
        {
            tlCadCombustivel cadCombustivel = new tlCadCombustivel();

            cadCombustivel.Show();
        }
        private void cadastrarCombustívelToolStripMenuItem_Click(object sender, EventArgs e)
        {
            tlCadCombustivel cadCombustivel = new tlCadCombustivel();

            cadCombustivel.Show();
        }