public static void BindTo <TFrom, TTo>(this ObservableCollection <TFrom> from, ICollection <TTo> to) where TFrom : TTo
{
if (from == null)
{
throw new ArgumentNullException("from");
}
if (to == null)
{
throw new ArgumentNullException("to");
}
to.Clear();
CollectionUtilities.AddRange <TTo>(to, Enumerable.Cast <TTo>((IEnumerable)from));
CollectionUtilities.StartReplicatingChangesTo <TTo>((INotifyCollectionChanged)from, to, true);
}
public static NotifyCollectionChangedEventHandler StartReplicatingChangesTo <TTo>(this INotifyCollectionChanged from, ICollection <TTo> to, bool preserveOrder, Func <object, TTo> selector)
{
if (from == null)
{
throw new ArgumentNullException("from");
}
if (to == null)
{
throw new ArgumentNullException("to");
}
NotifyCollectionChangedEventHandler changedEventHandler = (NotifyCollectionChangedEventHandler)((sender, e) =>
{
if (e.OldItems != null)
{
foreach (object item_0 in (IEnumerable)e.OldItems)
{
to.Remove(selector(item_0));
}
}
if (e.NewItems == null)
{
return;
}
List <TTo> local_1 = new List <TTo>();
foreach (object item_1 in (IEnumerable)e.NewItems)
{
local_1.Add(selector(item_1));
}
IList <TTo> local_3;
if (preserveOrder && (local_3 = to as IList <TTo>) != null)
{
CollectionUtilities.InsertRange <TTo>(local_3, e.NewStartingIndex, (IEnumerable <TTo>)local_1);
}
else
{
CollectionUtilities.AddRange <TTo>(to, (IEnumerable <TTo>)local_1);
}
});
from.CollectionChanged += changedEventHandler;
return(changedEventHandler);
}