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
Steps in Fixing this Error: MetaData File .dll could not be found.
Clean All Projects.
Unload All Projects.
Reload All Projects.
ReBuild Solution.
Then problem solved.
Cleaning my solution caused this problem with Visual Studio 2017. Unloading/reloading projects or more cleaning made no difference. Only thing that worked was closing and restarting Visual Studio.
I had this same error. In my case I had built a library (call it commsLibrary) that referenced other libraries by including them as projects in my solution. Later, when I built a project and added my commsLibrary, whenever I would build I got the metadata file cannot be found error. So I added the libraries that my comms library referenced to the current project, then it was able to build.
After facing so many troubles, here is the solution that I found.
open that file in any text editor and find your missing file ItemGroup.
<ItemGroup>
<None Include="..." />
</ItemGroup>
remove that ItemGroup and open once again your project and build
I fix this problem following this steps:
The problem was that I had some other normal error messages in my project, and apparently after I fixed those and when I cleaned and built my project AGAIN, then all .dlls succeeded.
Make sure you don't have any other error messages in your project and if you do, fix those first!