.net - How do I make a ListBox refresh its item text? -

i'm making example hasn't yet realized controls listbox don't have contain strings; had been storing formatted strings , jumping through complicated parsing hoops data out of listbox , i'd show him there's better way.

i noticed if have object stored in listbox update value affects tostring, listbox not update itself. i've tried calling refresh , update on control, neither works. here's code of example i'm using, requires drag listbox , button onto form:

public class form1      protected overrides sub onload(byval e system.eventargs)         mybase.onload(e)          integer = 1 3             dim tempinfo new numberinfo()             tempinfo.count =             tempinfo.number = * 100             listbox1.items.add(tempinfo)         next     end sub      private sub button1_click(byval sender system.object, byval e system.eventargs) handles button1.click         each objitem object in listbox1.items             dim info numberinfo = directcast(objitem, numberinfo)             info.count += 1         next     end sub end class  public class numberinfo      public count integer     public number integer      public overrides function tostring() string         return string.format("{0}, {1}", count, number)     end function end class

i thought perhaps problem using fields , tried implementing inotifypropertychanged, had no effect. (the reason i'm using fields because it's example , don't feel adding few dozen lines have nothing topic i'm demonstrating.)

honestly i've never tried updating items in place before; in past i've been adding/removing items, not editing them. i've never noticed don't know how make work.

so missing?

bindinglist handles updating bindings itself.

using system; using system.componentmodel; using system.windows.forms;  namespace testbindinglist {     public class employee     {         public string name { get; set; }         public int id { get; set; }     }      public partial class form1 : form     {         private bindinglist<employee> _employees;          private listbox lstemployees;         private textbox txtid;         private textbox txtname;         private button btnremove;          public form1()         {             initializecomponent();              flowlayoutpanel layout = new flowlayoutpanel();             layout.dock = dockstyle.fill;             controls.add(layout);              lstemployees = new listbox();             layout.controls.add(lstemployees);              txtid = new textbox();             layout.controls.add(txtid);              txtname = new textbox();             layout.controls.add(txtname);              btnremove = new button();             btnremove.click += btnremove_click;             btnremove.text = "remove";             layout.controls.add(btnremove);              load+=new eventhandler(form1_load);         }          private void form1_load(object sender, eventargs e)         {             _employees = new bindinglist<employee>();             (int = 0; < 10; i++)             {                 _employees.add(new employee() { id = i, name = "employee " + i.tostring() });              }              lstemployees.displaymember = "name";             lstemployees.datasource = _employees;              txtid.databindings.add("text", _employees, "id");             txtname.databindings.add("text", _employees, "name");         }          private void btnremove_click(object sender, eventargs e)         {             employee selectedemployee = (employee)lstemployees.selecteditem;             if (selectedemployee != null)             {                 _employees.remove(selectedemployee);             }         }     } }