Finally Extensions V2 supports DotNet (At least in the Developer Preview.
But as soon as you fire this up, perhaps with the help of TXT2AL, you’re met with assemblies not resolved. Both assemblies from standard DotNet (from the global assembly cache) and standard NAV DLLs.
"al.assemblyProbingPaths": [ "./.netpackages", "c:/Windows/assembly/", "C:/Program Files/Microsoft Dynamics NAV/110/Service/Add-ins" ],
Restart Visual Studio Code and everthing should work 🙂