how to open user control when click on another user control.

Question

hi 

 i have one control project ,there is one button when i click on button then i need to open another control windows means simply i have two user control usercontrol1 and usercontrol2.when i click on usercontrol1 then usercontrol 2 is show.so i write code  usercontrol2 obj=new usercontrol2;

obj.show();   i build this control project and add dll the my main window project .it will not work and do not show any warning .so tell me how to do it

 

 

thank you advance..