Correctly maintain TreeContainerIndex.

Fixes #434
11 years ago · 92bca08e3b
1 changed files with 1 additions and 0 deletions
--- a/src/Perspex.Controls/Generators/TreeItemContainerGenerator.cs
+++ b/src/Perspex.Controls/Generators/TreeItemContainerGenerator.cs
@ -68,6 +68,7 @@ namespace Perspex.Controls.Generators
            }
            else if (container != null)
            {
+                Index.Add(item, container);
                return container;
            }
            else