Tag Archives: asp.net

There is a duplicate system.web.extensions/scripting/scriptResourceHandler section defined

You’ve been working with no problems probably in VS2008 on web app written on .net 2 or .net 3.5 or .net 3.5 sp1 and then you try running on a machine with windows 7 or vista running IIS7 and you get this error message…
Simples. It’s comes of running your .Net 2 (you did know that a .Net 3.5 app actually runs on .Net 2 didn’t you?) app under .Net 4. Fix it by changing the app pool for your web app to the pre-defined “Classic .Net App Pool”, which runs .Net framework 3
Run a dotNet 2 or dotNet 3 or dotNet 35 app under IIS7

ASP.NET MVC 2 Localization and Local Resource Files

The complete guide to localization with Global Resources is at While my keyboard gently weeps – ASP.NET MVC 2 Localization complete guide but here’s a simple summary:

Using Global Resources for Asp.NET MVC Localization Quick Start

  1. Create ordinary resource files in your project and fill ’em up.
  2. Add a Page Import directive to your MVC view:
    <%@ Import namespace=”My.Project.Name.PathTo.WhereverYourResourceFileIs” %>
  3. Behold the compiled fields available to you in intellisense:
    <%=ResourceFileName.MyPropertyName %>

Using Local Resources for Asp.NET MVC Localization Quick Start

The net and his dog seems to want to discourage you from using Local resource files with MVC. There are two or three riddles and here’s how to solve them:

  1. Right click your view directory. choose Add -> Add Asp.Net Folder -> App_LocalResources.
  2. Create resource files in there with names to exactly match the View name (so you end up with MyView.aspx.resx as the file name).
  3. Change the access modifier from its default No Code Generation to Public
  4. Type in your resource strings
  5. Add a Page Import directive to your MVC view:
    <%@ Import namespace="My.Project.Name.Views.ViewName.App_LocalResources" %>

    . Get the exact namespace by opening up the Resource File’s aspx.Designer.cs file.

  6. While you’re in the resource Designer.cs file note the class name: ActionName_aspx
  7. Behold the compiled fields available to you in intellisense:
    <%=ActionName_aspx.MyPageSpecificPropertyName %>
  8. Be awed and depressed when you build and run and get the error message ”Could not find any resources appropriate for the specified culture or the neutral culture. Make sure …. etc etc”. Fix this by clicking on the resx file in solution explorer and changing its Build Action from Content to Embedded Resource.. (thanks to http://www.devproconnections.com/article/aspnet22/ASP-NET-MVC-Localization for this point).

LocalizedDisplayNameAttribute class for Asp.Net MVC2

For whatever reason, in MVC2 the DisplayName attribute isn’t localizable in the way that ValidationAttributes are – it doesn’t have a constructor that looks up resources.

So here’s how to localise DisplayName:

public class LocalizedDisplayNameAttribute : DisplayNameAttribute
    public LocalizedDisplayNameAttribute(Type resourceType, string resourceKey) : base(LookupResource(resourceType, resourceKey)) {  }
    public LocalizedDisplayNameAttribute(Type resourceType) : base(LookupResource(resourceType, DisplayNameAttribute.Default.DisplayName) ) { }

    internal static string LookupResource(Type resourceType, string resourceKey)
        return new ResourceManager(resourceType).GetString(resourceKey) ?? resourceKey;

Note! This will all fail dismally unless … your resource file is marked as public, rather than internal. Because Views are not compiled as part of the web project assembly, rather they are compiled at runtime by the asp.net compiler into a different assembly

Don’t do iisreset do …

a mini batch file in your start menu, when you’re debugging the application startup of a .Net application, and keep wanting to restart it:

taskkill /im aspnet_wp.exe /f
if not errorlevel == 0 pause


taskkill /im w3wp.exe /f
if not errorlevel == 0 pause

which does the job much faster.

Assuming, of course, that your reason for wanting to do an iis reset was to force a .Net application restart. And you don’t mind forcing all running .Net applications to restart. And you’re not on a busy production machine at rushhour.