[Request] Navigate to source code

[seanmars]

Environment data

dotnet --info output:
Product Information:
Version: 2.1.104
Commit SHA-1 hash: 48ec687460

Runtime Environment:
OS Name: Windows
OS Version: 10.0.16299
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\2.1.104\

Microsoft .NET Core Shared Framework Host

Version : 2.0.6
Build : 74b1c703813c8910df5b96f304b0f2b78cdf194d
C# Extension version:

Steps to reproduce

ctrl + left-click

Expected behavior

Navigate to source code of framework or package

Actual behavior

only metadata

[DustinCampbell]

This is a duplicate of #2207.