c# - How do update an item in an ObservableCollection? -

i have , observablecollection reason code not work.

 private void updatechildreninclass()     {         var item = childreninclass.firstordefault(i => i.name == currentchild.name);         if (item != null)         {             item = currentchild;          }     } 

item displays currentchild properties if in chidreninclass item properties have not been updated.

the problem item pointing object in observablecollection wanted update, set item point object(currentchild)