c# - How to update ArrayList to match user-ordered TreeView -

i have gtk treeview displaying list of items in arraylist. treeview set reorderable, user can drag , drop items in list re-order them.

my question is, how update original arraylist match new treeview ordering once reordering has taken place?

i have managed come solution - code below prints out items in list; can see how doing can find correct index items , reorder them in associated arraylist.

        treeiter iter;         yournodeview.model.getiterfirst (out iter);         (int = 0; < yournodeview.model.iternchildren(); i++)         {             string result = ((typeoflistitem)sequencernodeview.model.getvalue (iter, 0)).tostring();             //here add typeoflistitem instance new arraylist, , after loop swap out old arraylist new one.              console.writeline("print item "+result);             yournodeview.model.iternext(ref iter);         } 

the typeoflistitem of course time. have written class called mylistitem has parameters such title , description, can access them with:

string result = ((mylistitem)sequencernodeview.model.getvalue (iter, 0)).title;