public add_user_product()
        {
            InitializeComponent();
            instance = this;
            var material_skin = MaterialSkinManager.Instance;

            material_skin.AddFormToManage(this);
            material_skin.Theme = MaterialSkinManager.Themes.DARK;

            this.materialSingleLineTextField3.Text = Program.general.name_pc_set;

            if (File.Exists("products.ini"))
            {
                Program.general.read_file_product(this.comboBox1, "products.ini", "", comboBox2);
            }
        }
        private void materialRaisedButton2_Click(object sender, EventArgs e) // add user product
        {
            add_user_product user_product = new add_user_product();

            user_product.ShowDialog();
        }