User:Vipulm124/sandbox

app.config It is an application configuration file is an XML file used to control assembly binding. It can redirect an application from using one version of a side-by-side assembly to another version of the same assembly. This is called per-application configuration.

An app.config file exists in Windows Form application of .NET whereas a web.config file exists in a Web Application in .NET. Therefore, both these files should not be confused.