Handle requesting children of unrealized containers.

6 years ago · b1d34acdc6
1 changed files with 1 additions and 1 deletions
--- a/src/Avalonia.Controls/TreeView.cs
+++ b/src/Avalonia.Controls/TreeView.cs
@ -395,7 +395,7 @@ namespace Avalonia.Controls
        private void OnSelectionModelChildrenRequested(object sender, SelectionModelChildrenRequestedEventArgs e)
        {
            var container = ItemContainerGenerator.Index.ContainerFromItem(e.Source) as ItemsControl;
-            e.Children = container.GetObservable(ItemsProperty);
+            e.Children = container?.GetObservable(ItemsProperty);
        }

        private TreeViewItem GetContainerInDirection(