The machine. config file is the master configuration file on your system with a lot of default settings. Web. config is the file for the local settings to be applied for a website which store configuration data in XML format.
What is a machine config?
Machine configuration file, Machine. config, contains settings that apply to an entire computer. It is specifically used to store machine and application settings global to all asp.net web sites running in IIS in a computer. A system can have only one machine.
Where is machine config?
The machine. config file is stored in the %WINDIR%\Microsoft.NET\Framework folder in the directory where Microsoft Windows is installed. By default, it is located in the following path: C:\WINDOWS\Microsoft.NET\Framework\v1. 1.4322\CONFIG.