Hidden WPF: Secrets for Creating Great Applications in Windows Presentation Foundation

Solving 404 Errors

After you move your application to an Internet Information Services server, clients might not be able to complete downloading the application, with a 404 error saying that the configuration file couldn’t be downloaded. If this happens, open the IIS Manager, select the website that hosts your application, and finally click Request Filtering. At this point you should see a list of file extensions and a Boolean value indicating whether files with that extensions can be accessed (True) or not (False). If the .config extension is False, you’ve found the problem. Unfortunately, editing an extension directly isn’t possible, so you first need to remove it (Remove) and add it again (Allow File Name Extension). You don’t need to restart ...