diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index eabc56ed..0dfb68c2 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 d76e9d3b..8eefa2b6 100644
Binary files a/Bin/net5.0-windows/SunnyUI.dll and b/Bin/net5.0-windows/SunnyUI.dll differ
diff --git a/Bin/net5.0-windows/ref/SunnyUI.dll b/Bin/net5.0-windows/ref/SunnyUI.dll
index 775e6f5f..44a11c13 100644
Binary files a/Bin/net5.0-windows/ref/SunnyUI.dll and b/Bin/net5.0-windows/ref/SunnyUI.dll differ
diff --git a/Bin/netcoreapp3.1/SunnyUI.dll b/Bin/netcoreapp3.1/SunnyUI.dll
index a3c2ea10..01f019a0 100644
Binary files a/Bin/netcoreapp3.1/SunnyUI.dll and b/Bin/netcoreapp3.1/SunnyUI.dll differ
diff --git a/SunnyUI/Controls/UIRadioButtonGroup.cs b/SunnyUI/Controls/UIRadioButtonGroup.cs
index 18e93fbb..f5421ab1 100644
--- a/SunnyUI/Controls/UIRadioButtonGroup.cs
+++ b/SunnyUI/Controls/UIRadioButtonGroup.cs
@@ -56,6 +56,14 @@ namespace Sunny.UI
             buttons.Clear();
         }
 
+        public void Clear()
+        {
+            Items.Clear();
+            ClearButtons();
+            SelectedIndex = -1;
+            Invalidate();
+        }
+
         [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
         [Localizable(true)]
         [Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]