C# (CSharp) Managers.Insert примеры использования

Пример #1

        public SelectLists(IEnumerable <string> managersList, IEnumerable <string> dateOfSalesList, IEnumerable <string> productsList)
        {
            Managers    = managersList.ToList();
            Products    = productsList.ToList();
            DateOfSales = dateOfSalesList.ToList();

            DateOfSales.Sort();
            Managers.Sort();
            Products.Sort();
            DateOfSales.Insert(0, "All");
            Managers.Insert(0, "All");
            Products.Insert(0, "All");
        }