In this tutorial, we are going to cover how to add Facebook login to Asp.Net Core 3.0 app using Visual Studio 2019. So, it will enable users to login with their Facebook account in Asp.Net Core 3.0 application. So, first-of-all, we will create an app in Facebook developer account and then we will create a new Asp.Net Core 3.0 application using Visual Studio 2019 and then we will configure the Facebook app with Asp.Net Core 3.0 app and then finally we will see how it works.