private void enterButton_Click(object sender, EventArgs e) { _refrigerator.ItemNo.Add(int.Parse(itemNoTextBox.Text)); _refrigerator.ItemWeight.Add(double.Parse(itemWeightTextBox.Text)); double totalWeight = _refrigerator.CalculateWeight(count); count++; if (_refrigerator.Validate(totalWeight)) { currentWeightTextBox.Text = _refrigerator.CurrentWeight(totalWeight) + ""; remainingWeightTextBox.Text = _refrigerator.RemainingWeight() + ""; showRichTextBox.Text = _refrigerator.ShowValue(); } else { MessageBox.Show("Weight Overflow!!"); } itemNoTextBox.Clear(); itemWeightTextBox.Clear(); }