Unity not seeing external library?

Question

Unity

The situation is this: I decided to make a small project to work with bluetooth in c#. I use the third-party library 32feet.NET for this - I downloaded it, installed it in the studio through the Project - add a link - connected the dll file of the library, registered the using I needed - everything is in order - all classes and types appeared, the studio sees everything calmly, no errors. But Unity3d, in which I am doing this project (I still don’t know how to develop under android, but here ui and everything you need can be assembled for almost any OS) - stubbornly does not see the classes and data types used in the project, although the library is connected.
UPD: when building a project in the studio, the types are also not visible, but did I include the dll library?

Answer 1

First. If you work in a unit - include your own library in the unit. To do this, just put it in the Assets / Plugins folder. Secondly, there is no guarantee that your library will start under the unit (and even more so under the droid) - no. Because the unit uses its own version of mono. If you need this in a unit, look for a plugin on its assetstore.