VS 2017 Metadata file '.dll could not be found

Question

I know there is another question with exact the same problem, but I went trough all those answers, and none helped me. :( (This was the question.)

I just created a new A

Answer 1

Steps in Fixing this Error: MetaData File .dll could not be found.

1. Clean All Projects.

2. Unload All Projects.

3. Reload All Projects.

4. ReBuild Solution.

Then problem solved.