Use Unity project in Windows Form Application

Is there a way that I can use A project made in unity and import it or just reference dll on Windows Form Application?

To make things more clear, I want to put some data in windows form app and on click of a button i want to see, for example, a floor of the house or the entire house that will use unity libraries and background. Later I can in that window rotate and select walls etc.

Honestly this is an interesting question. I propose you try it, just add some using statements, start tossing some WPF gui down, and see if you can compile both ends, while retaining references. Might work pretty well, or Unity may not compile the WPF end of it, but that is not to say that your WPF end wont compile with Unity data.

EDIT: Your main snag is going to be rendering the graphics in WPF, but who knows what insanity can accomplish? Heh, I’d like to find out.