private void EnterButton_Click(object sender, EventArgs e) { int itemQ = Convert.ToInt32(itemTextBox.Text); double Weight = Convert.ToDouble(weightTextBox.Text); bool flag = Refrigerator.PutItems(itemQ, Weight); if (flag) { Show(); } else { MessageBox.Show("Your given amount can’t be entered because it will be over flown.", "Alert", MessageBoxButtons.OK, MessageBoxIcon.Warning); } }