c# - Windows form application layout checListBox -

i trying develop windows form application school, teacher , students. in application, have ability choose application filter list of student , teacher using application. layout, think selecting list of application, going use combo box trick.

but cannot think of filtering teacher , student. let when application selected, list of teacher pop , user has ability chose list of teacher , have ability use select teachers popped up. thinking of using checklistbox, tried in of own tutorial , found out don't need click check box select item, can click side of item , same (let trying string message box pop up, message box pop checked items not checking check box list box). not sure because of code or there bugs in check list box?

what did iterate through checklistbox , check on checked. doing wrong or foreach loop did .checkeditems method

   foreach(var item in checklistbox.checkeditems)      {           if(something check){               //                  }          }