missing \bin\roslyn on sln build

[jVanZwieten]

Summary

Out of the box, building the project does not output \bin\roslyn\. This causes error on run.

Steps to Reproduce

1. clone project
2. open sln through Visual Studio
3. run through Visual Studio

Expected

Project builds and then runs successfully.

Observed

Server error in '/' Application. Could not find a part of the path '[...]\bin\roslyn\csc.exe'.

Workaround

https://stackoverflow.com/a/34391473/5899370

run this in Package Manager Console:
Update-Package Microsoft.CodeDom.Providers.DotNetCompilerPlatform -r