diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index 38afd3bd..60749e1e 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/Bin/net5.0-windows/SunnyUI.dll b/Bin/net5.0-windows/SunnyUI.dll
index 0d7183d0..59ba2271 100644
Binary files a/Bin/net5.0-windows/SunnyUI.dll and b/Bin/net5.0-windows/SunnyUI.dll differ
diff --git a/Bin/netcoreapp3.1/SunnyUI.dll b/Bin/netcoreapp3.1/SunnyUI.dll
index 9f7fb368..1ab92cec 100644
Binary files a/Bin/netcoreapp3.1/SunnyUI.dll and b/Bin/netcoreapp3.1/SunnyUI.dll differ
diff --git a/SunnyUI/Controls/UIComboBox.cs b/SunnyUI/Controls/UIComboBox.cs
index 5d2f939c..1a751ad6 100644
--- a/SunnyUI/Controls/UIComboBox.cs
+++ b/SunnyUI/Controls/UIComboBox.cs
@@ -86,7 +86,7 @@ namespace Sunny.UI
             if (SelectedIndex != ListBox.SelectedIndex)
             {
                 SelectedIndex = ListBox.SelectedIndex;
-                Box_SelectedIndexChanged(null, null);
+                //Box_SelectedIndexChanged(null, null);
                 Invalidate();
             }
         }