diff --git a/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml b/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml
index 96fe32a..9f3ae00 100644
--- a/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml
+++ b/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml
@@ -4,6 +4,26 @@
+
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diff --git a/src/Ursa.Themes.Semi/Controls/_index.axaml b/src/Ursa.Themes.Semi/Controls/_index.axaml
index a369754..9a138a9 100644
--- a/src/Ursa.Themes.Semi/Controls/_index.axaml
+++ b/src/Ursa.Themes.Semi/Controls/_index.axaml
@@ -20,6 +20,7 @@
+
diff --git a/src/Ursa/Controls/ComboBox/MultiComboBox.cs b/src/Ursa/Controls/ComboBox/MultiComboBox.cs
index 3bdba24..7ce9d28 100644
--- a/src/Ursa/Controls/ComboBox/MultiComboBox.cs
+++ b/src/Ursa/Controls/ComboBox/MultiComboBox.cs
@@ -1,4 +1,6 @@
-using System.Collections.ObjectModel;
+using System.Collections;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Primitives;
@@ -8,8 +10,6 @@ namespace Ursa.Controls;
public class MultiComboBox: SelectingItemsControl
{
- private ComboBox _box;
-
private static ITemplate _defaultPanel = new FuncTemplate(() => new VirtualizingStackPanel());
public static readonly StyledProperty IsDropDownOpenProperty =