Don't add duplicate logical children.

4 years ago · c9bb9f2c01
1 changed files with 6 additions and 1 deletions
--- a/src/Avalonia.Controls/ItemsControl.cs
+++ b/src/Avalonia.Controls/ItemsControl.cs
@ -559,7 +559,12 @@ namespace Avalonia.Controls
            return new ItemContainerGenerator(this);
        }

-        internal void AddLogicalChild(Control c) => LogicalChildren.Add(c);
+        internal void AddLogicalChild(Control c)
+        {
+            if (!LogicalChildren.Contains(c))
+                LogicalChildren.Add(c);
+        }
+
        internal void RemoveLogicalChild(Control c) => LogicalChildren.Remove(c);

        /// <summary>