Class Lybrary Windows Forms

Question

Hey You've created a project (class Lybrary). H with base class is the "class1" and works perfectly within the outside proxekt but this and other classes but when I put as the main reference in my project I do not see the secondary classes.
eg NAME project. Class 1 is now
I want to go to the second class
eg NAME project. Class 2
What can I do;