How to connect the library in visual studio c#?

How to connect the library in visual studio c#?
For example this:
https://archive.codeplex.com/?p=javascriptdotnet
Or this
tjanczuk.github.io/edge/#/2

If you can explain how very stupid)))
June 7th 19 at 15:42
1 answer
June 7th 19 at 15:44
Solution
Solution Explorer - References - Right click - Add reference - Browse - Browse... - Choose file - Put-tick - OK. In the references it should appear.
5a91c9972dee5390980757.png
And which file to choose?...) - renee_Klock commented on June 7th 19 at 15:47

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