It is, indeed, a trivial task but you may come across errors from other DLLs that require you to sign your library.
The task to do that is rather simple: Open a command prompt and run:
"C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools\x64\sn.exe" -k YourFileName.snk
Make sure your version matches in the path first.
Then, go to project properties, Signing and browse to the newly created
file. All set!