winforms - remove item selected of first comboBox from second comboBox c# windows form application -

i having problem:

i making windows forms application in c#.

the problem i'm having have 4 comboboxes, , when select item combobox1 item should removed combobox2, combobox3 , combobox4.

similarly, selected item combobox2 should removed combobox3 , combobox4, , on.

i have tried can't head around it.

yep,

you should code in comboboxes selectedchange events:

private void combobox1_selectedindexchanged(object sender, eventargs e)         {              (int = 0; < combobox2.items.count; i++)             {                 if (combobox2.items[i] == combobox1.selecteditem)                 {                     combobox2.items.remove(combobox2.items[i]);                      i--;                 }             }         } 

it works if items string, if have custom object should cast items , compare specific property on them id example.