Question

i am watching this tutorial. at around 15:40, the speaker said something like a LINQ query won’t create a rich collection like BindingListCollectionView. i am thinking maybe it means changes wont be saved to the database or something. so i tried replacing

var result = database.Customers.Execute(System.Data.Objects.MergeOption.AppendOnly);

with

var result = from cust in database.Customers
             where cust.City == "Seattle"
             select cust;

and all still works fine.

Answer 1

ObservableCollection have an event that is fired when their contents changed so a ListView, ComboBox, etc can stay in sync with your data when it changes. If the contents of the list will never change then having an ObservableCollection is not necessary.