While it's not generally needed, you may want to step into ABP's source code while you debugging your project.

All official ASP.NET Boilerplate nuget packages are  enabled. That means you can easily debug Abp.* nuget packages within your project. To enable it, change Visual Studio (2017+) Debugging options as like below:

 

Once you enable it, you can step into (F11) ASP.NET Boilerplate source code.