private void EnterButton_Click(object sender, EventArgs e) { aRefrigerator.AddItemunit(Convert.ToDouble(itemTextBox.Text), Convert.ToDouble(weightTextBox.Text)); if (aRefrigerator.Validation()) { currentWeightTextBox.Text = aRefrigerator.CurrentWeight().ToString(); remainingWeightTextBox.Text = aRefrigerator.RemainingWeight().ToString(); } else { MessageBox.Show("maximun weight limit excedd"); } }