asp.net – HttpContext.Current不解析在MVC 4项目

我想使用ImageResizer(从ImageResizing点网)。我通过NuGet为MVC安装ImageResizer。但是当我去使用下面的代码从示例：

//Loop through each uploaded file
        foreach (String fileKey in @R_674_10107@Context.Current.request.Files.Keys)
        {
            @R_674_10107@PostedFile file = @R_674_10107@Context.Current.request.Files[fileKey];
            if (file.ContentLength <= 0) conTinue; //Skip unused file controls.

            //The resizing setTings can specify any of 30 commands.. See @R_674_10107@://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();
        }

foreach中的“@R_674_10107@Context.Current.request.Files.Keys”不能解析？我有我的正确使用和Visual studio不提供“Resolve”选项。