private void EnterButton(object sender, EventArgs e) { refrigerator.NoItem = Convert.ToInt32(itemTextBox.Text); refrigerator.UnitWeight = Convert.ToDouble(weightTextBox.Text); refrigerator.Add(refrigerator.NoItem, refrigerator.UnitWeight); currentWeightTextBox.Text = Convert.ToString(refrigerator.GetCurrentWeight()); remainingWeightTextBox.Text = Convert.ToString(refrigerator.GetRemainingWeight()); itemTextBox.Clear(); weightTextBox.Clear(); }