private void VulDeComboBox()
        {
            productlinesList = ProductlineManager.GetProductlines();

            productlinesList.Insert(0, new Productline {
                Name = "All Models"
            });
            comboBoxProductLine.ItemsSource   = productlinesList;
            comboBoxProductLine.SelectedIndex = 0;
        }
        public ProductlineValueList()
        {
            List <Productline> productLineItems = new List <Productline>();

            productLineItems = ProductlineManager.GetProductlines();
            foreach (var pl in productLineItems)
            {
                this.Add(pl);
            }
        }