private void button6_Click(object sender, EventArgs e) { ItemsFactory itemsFactory = new ItemsFactory(); item = itemsFactory.CreateItem(comboBox2.Text); item.Id = Convert.ToInt32(textBox5.Text.Trim());; item.Name = textBox3.Text; item.price = textBox4.Text; item.Category = comboBox2.Text; Item_Manager _Manager = new Item_Manager(); _Manager.AddItem(item); v(); }