How to Asp.Net configurations
After an ASP.NET application is finished, it needs to be configured on an application Web Server for launching it as a Web site on the network system. The configuration information for the ASP.NET applications is stored XML based configuration files, so they are readable and can be edited in any XML editor or in Visual Studio .NET directly.
In ASP.NET, configuration information is stored in one of two files: machine.config or web.config. The main difference between these two files is that the machine.config file is applied system level configuration while the web.config is implemented to each application based on the inheritance rules.