Visual Studio- Illegal characters in path

Question

This happen after Visual Studio Community 2017 latest update. Every time I try to open my project I get following warning:

Warning IDE0006 Error e

Answer 1

I had a similar problem but in my case, it was down to strange characters in a Reference:

Changing the above to:

Resolved this particular issue.

Tip: I resolved this with trial and error. I commented out all of the ItemGroups in the csproj file and reintroduced them one by one. Although your project may fail to build during this process it is clear when the above error occurs as you will see just this error and not other build errors due to missing ItemGroups.