how to add a class library to my project? Help

Question

Hi all,

 

 

I have been trying to learn on my own how to add a class library to a project but without avail.

 

Basically, I am following the guide from MSDN

 

https://msdn.microsoft.com/en-us/library/cc668164(d=printer).aspx 

 

From the tutorial, I am supposed to be able to click on the add reference and select the class library and add in.  But, when I click on the class library it opens up further and I am stuck on which one to add.  I tried the properties files but it gives me error.

 

Can someone show me an example how to do it ?

 

Also, I wonder if it is possible to create a project and create a class library from there for the Object layer without creating 2 projects like what the MSDN did ?

 

Tks.