App.config and Web.config files are a great way to add flexibility to your .NET application without having to modify code in the future. They also allow clients or end users to make configuration ...

These files include machine.config and web.config. The web.config file is application-specific and is created by default when you create a web application or a web site in Visual Studio.

If you're concerned about keeping critical information in your Web.config file, then you should encrypt it -- or at least the parts that you're concerned about.

It is easy to create additional build configurations to support multiple environments via transforms. Unfortunately, not everything can be handled in web.config files many settings need to be changed ...

Likewise, the Machine.config system file provides ASP.NET configuration settings for the entire Web server and forms the base settings for Web.config files used within an ASP.NET application ...