public ChangeTrackingList(Collection <T> list)
: base(list)
{
// Add items to the change tracking list
foreach (T item in list)
{
changeTracker.Add(item);
}
}
public ChangeTrackingHelper <T> GetChanges()
{
// 重建新的ChangeTrackingList
ChangeTrackingHelper <T> changes = new ChangeTrackingHelper <T>();
foreach (T existing in this)
{
if (existing.TrackingState != TrackingInfo.Unchanged)
{
changes.Add(existing);
}
}
// Append deleted items
foreach (T deleted in deletedItems)
{
changes.Add(deleted);
}
return(changes);
}