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The first and most important part of your code would be to get rid of any ViewBag/ViewData (which I personally consider as cancer for MVC applications) and use view models and strongly typed views. So let's start by defining a view model which would represent the data our view will be working with (a dropdownlistg in this example):public class MyViewModel{    public string SelectedItem { get; set; }    public IEnumerable
     
       Items { get; set; }}then we could have a controller:public class HomeController : Controller{    public ActionResult Index()    {        var model = new MyViewModel        {            // I am explicitly putting some items out of order            Items = new[]            {                new SelectListItem { Value = "5", Text = "Item 5" },                new SelectListItem { Value = "1", Text = "Item 1" },                new SelectListItem { Value = "3", Text = "Item 3" },                new SelectListItem { Value = "4", Text = "Item 4" },            }        };        return View(model);    }}and a view:@model MyViewModel@Html.DropDownListForSorted(    x => x.SelectedItem,     Model.Items,     new { @class = "foo" })and finally the last piece is the helper method which will sort the dropdown by value (you could adapt it to sort by text):public static class HtmlExtensions{    public static IHtmlString DropDownListForSorted
      
       (        this HtmlHelper
       
         helper,         Expression
        
         
          > expression,         IEnumerable
          
            items, object htmlAttributes ) { var model = helper.ViewData.Model; var orderedItems = items.OrderBy(x => x.Value); return helper.DropDownListFor( expression, new SelectList(orderedItems, "Value", "Text"), htmlAttributes ); }}