Abp vnext supports SourceLink.
I set as mentioned above, it doesn't work.
You should do more settings:
- Enable Symbol Serves
After this, you can debug the asp.net core source code, you can see the Symbols loaded in output window, but volo.abo.* symbols cannot be loaded. 
2.Copy Volo.Abp.Core.dll and Volo.Abp.Core.pdb to your working debug bin folder.
There are in the nuget install package path, like "C:Users[GerryGe].nugetpackagesvolo.abp.core2.3.0lib
etstandard2.0"
After this I can step into abp source code, see my screenshots:
