Ok, I resolved problems using GetProperty method. Now, my question is:

I now have 2 dlls in the Debug directory:

Siriusware.Library.dll - it is 37kb

and

Siriusware.Library.AddressVerification.dll which is just 7kb.

Do I need to include both of them or I somehow can embed the first one into the other one? I could not find out what do I need to do for the second option.