How do I show unchecked items of a checked list box in another checked list box

Hi

I have two checked list box i.e. checkedlistbox1 and checkedlistbox2

i have 10 items in checkedlistbox1. Now i select few item in checkedlistbox1.

The unselected items should be displayed in checkedlistbox2.

How do i implement it in c# windows form based application?