//adicionar um lanche
        private void btAdicionar_Click(object sender, EventArgs e)
        {
            TelaCadastrarLanche tela = new TelaCadastrarLanche();

            tela.FormClosed += Tela_FormClosed;
            tela.MdiParent   = this.MdiParent;
            tela.Show();
        }
        private void dgBebidas_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            object obj = Util.GetCellValueFromColumnHeader(dgLanches.SelectedRows[0].Cells, "Id");

            if (obj == null)
            {
                return;
            }

            long Id = (long)Util.GetCellValueFromColumnHeader(dgLanches.SelectedRows[0].Cells, "Id");

            TelaCadastrarLanche tela = new TelaCadastrarLanche(Id);

            tela.FormClosed += Tela_FormClosed;
            tela.MdiParent   = this.MdiParent;
            tela.Show();
        }