Estoy deseando usar ImageResizer (de ImageResizing dot net). Instalé ImageResizer para MVC a través de NuGet. Pero cuando voy a usar el siguiente código del ejemplo:

//Loop through each uploaded file
foreach (string fileKey in HttpContext.Current.Request.Files.Keys)
{
    HttpPostedFile file = HttpContext.Current.Request.Files[fileKey];
    if (file.ContentLength <= 0) continue; //Skip unused file controls.

    //The resizing settings can specify any of 30 commands.. See http://imageresizing.net for details.
    //Destination paths can have variables like <guid> and <ext>, or 
    //even a santizied version of the original filename, like <filename:A-Za-z0-9>
    ImageResizer.ImageJob i = new ImageResizer.ImageJob(file, "~/uploads/<guid>.<ext>", new ImageResizer.ResizeSettings(
                            "width=2000;height=2000;format=jpg;mode=max"));
    i.CreateParentDirectory = true; //Auto-create the uploads directory.
    i.Build();
}

¿El "HttpContext.Current.Request.Files.Keys" en el foreach no está resolviendo? Tengo mis usos correctos y Visual Studio no ofrece opciones de "Resolver".