What is the Wwwroot folder?
Thereof, where can I find wwwroot folder?
By default, the wwwroot folder in the ASP.NET Core project is treated as a web root folder. Static files can be stored in any folder under the web root and accessed with a relative path to that root.
Similarly, how do I install wwwroot folder?
Right-click on the project and “Add” a folder. Name it wwwroot, Visual Studio automatically generates an icon on wwwroot folder. Under wwwroot folder, “Add” 3 more folders with the names CSS, JS and lib.
The file is saved in the App_Data folder. This folder is a special folder in ASP.NET that's used to store data files, as described in Introduction to Working with a Database in ASP.NET Web Pages Sites. The WriteAllText method of the File object writes the data to the file.