As you all know while developing a big application in asp.net everybody use Folders inside the application to keep the files separate. The Folder make an important for the developer sometime. In this Article I will tell you that how can you create as well as delete the folders inside your asp.net application. First to create an application you need to import “System.IO” Namespace. Because to create and remove folders we use the “DirectoryInfo” Class. As you will study this article later you will get the code with example about creating and deleting folder at runtime.