public static VehicleItem CreateInstance(string itemName)
        {
            if (Vehicle == null)
            {
                Vehicle = new VehicleItem(itemName);
            }

            return(Vehicle);
        }
        private void ItemAdd_Click(object sender, EventArgs e)
        {
            ListViewItem newItem = null;

            if (ItemVehicle.Checked)
            {
                VehicleItem.CreateInstance(ItemName.Text);
                if (CollegeListView.Items.Count != 0)
                {
                    if (CollegeListView.FindItemWithText(VehicleItem.GetName(), true, 0) == null)
                    {
                        newItem = new ListViewItem(VehicleItem.GetName());
                    }
                    else
                    {
                        return;
                    }
                }
                else
                {
                    newItem = new ListViewItem(VehicleItem.GetName());
                }
            }
            else if (ItemDorm.Checked)
            {
                DormItem newDormItem = new DormItem(ItemName.Text);
                newItem = new ListViewItem(newDormItem.GetName());
            }
            else if (ItemClass.Checked)
            {
                ClassItem newClassItem = new ClassItem(ItemName.Text);
                newItem = new ListViewItem(newClassItem.GetName());
            }
            else
            {
                return;
            }

            CollegeListView.Items.Add(newItem);
        }