collections that track changes?

Question

is there any collection that track changes made to the collection? say which object is deleted/modified/added?

The ObservableCollection just give notifications, it will not keep the removed in say a RemovedItems property. I have to keep them somewhere. actually why i am asking the question is if i bind a collection to a datagrid, it seems i have to do the change tracking myself, i wish there is a collection will do this so that i know how to update database using the collection.

The DataTable tracks changes, but it is not so easy to work with.

Answer 1

Try ObservableCollection. From the reference text:

Represents a dynamic data collection that provides notifications when items get added, removed, or when the whole list is refreshed.

EDIT. You may also want to try solving your problem by using data sets (i.e. the DataSet class and related). They can do row versioning and keep track of row state changes (new, edited, deleted), so it may work for you. This is a good introduction to the topic: http://msdn.microsoft.com/en-us/library/ww3k31w0.aspx