web.config
file
- web.config is parsed at runtime, so if you edit the web.config file, the web application will automatically load the changes in the config file.
- You can have more than one web.config file in your application. Specifically, you can have a web.config for each folder under your web application.
- The web.config file is required for ASP.NET webpages.
app.config
file
- app.config is used for Windows Forms, Windows Services, Console Apps and WPF applications.
- app.config is parsed at compile time, so if you edit the app.config file, you have to restart the application. At compile time a copy of the app.config file is taken, renamed to [output].config and moved to the build folder. This copy can then be modified, and your modifications will be read each time the application/service is started.
- There is always one app.config file in a window application.
- The app.config file is optional in an application and doesn't have to be used when writing desktop applications.
machine.config file
- machine.config
file is automatically installed on your system when you install
Visual Studio.Net. This is also called Machine
Level Configuration File.
Only one machine.config file exists on a server, and is at the
highest level in the configuration hierarchy.
- The settings of machine.config
file are applied to all the web applications residing on the server.
- The machine.config file is
overridden by the web.config file.
- Without the machine.config
file, application can not be executed.
thx..
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