vb.net - Observe List(Of) additions -

i have list (of customclass). somewhere within code, items added list although should not. code huge, can't debug occurs. therefore thinking of creating extension can break in when insert / add occurs when don't expect it.

can tell me if possible, , if yes, how?

i hope can somehow detect caller (the function) additions occur.

thank you.

i think have it:

imports system.collections.objectmodel  public class clscelllistextender      public class list(of t)         inherits collection(of t)          private _iid integer = 0          protected overrides sub insertitem(index integer, item t)             'your checks here              if typeof (item) clscell                 _iid += 1                 dim ncell clscell = trycast(item, clscell)                 ncell.tempid = _iid             end if              mybase.insertitem(index, item)         end sub      end class  end class 

i declare list clscelllistextender.list(of clscell).