private void button6_Click(object sender, EventArgs e) { //abrir consumo if (telaListarUsuarios == null) { telaAbrirConsumo = new Abrir_Consumo(); telaAbrirConsumo.Show(); telaAbrirConsumo.MdiParent = this; telaAbrirConsumo.Disposed += new EventHandler(telaAbrirConsumo_Disposed); } }
void telaAbrirConsumo_Disposed(object sender, EventArgs e) { telaAbrirConsumo = null; }