If you want scroll ListBox to the end automatically when new item added in ItemsSource collection you could use following attached behavior. This approach perfectly suit for MVVM way. ListBoxBehavior.cs: using System.Windows; namespace ListBoxBehavior { /// <summary> /// ListBox AutoScroll attached properties /// </summary> public static class ListBoxBehavior { public static readonly DependencyProperty AutoScrollProperty = DependencyProperty.RegisterAttached( "AutoScroll",...