public HeaderedDataGrid()
{
HeaderedItemsControlEx
.HeaderChanges(this, this.WhenAnyValue(a => a.ShowCountInHeader))
.Buffer(TimeSpan.FromSeconds(0.4))
.Select(a => a.LastOrDefault())
.WhereNotNull()
.ObserveOnDispatcher()
.Subscribe(a => Header = a);
}
public HeaderedListBox()
{
HeaderedItemsControlEx.HeaderChanges(this, this.WhenAnyValue(a => a.ShowCountInHeader))
.Subscribe(a => Header = a);
}