diff --git a/DarkUI/Controls/DarkDropdownList.cs b/DarkUI/Controls/DarkDropdownList.cs
index ad43722..d9158dc 100644
--- a/DarkUI/Controls/DarkDropdownList.cs
+++ b/DarkUI/Controls/DarkDropdownList.cs
@@ -257,6 +257,12 @@ namespace DarkUI.Controls
                 }
             }
 
+            if (e.Action == NotifyCollectionChangedAction.Reset)
+            {
+                _menu.Items.Clear();
+                SelectedItem = null;
+            }
+
             ResizeMenu();
         }