diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index a6e1893e..553d0228 100644
Binary files a/Bin/net40/SunnyUI.Demo.exe and b/Bin/net40/SunnyUI.Demo.exe differ
diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index 7f132b8f..1830d73a 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 bbcfb7b7..2527c682 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 bd568015..99f4d1ce 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 fc38caea..bfd820cb 100644
Binary files a/Bin/netcoreapp3.1/SunnyUI.dll and b/Bin/netcoreapp3.1/SunnyUI.dll differ
diff --git a/SunnyUI/Controls/UIRichTextBox.cs b/SunnyUI/Controls/UIRichTextBox.cs
index 3f3f7f87..9eb2a61b 100644
--- a/SunnyUI/Controls/UIRichTextBox.cs
+++ b/SunnyUI/Controls/UIRichTextBox.cs
@@ -46,6 +46,8 @@ namespace Sunny.UI
             edit.ScrollBars = RichTextBoxScrollBars.Vertical;
         }
 
+        public override Color BackColor { get => edit.BackColor; set { edit.BackColor = base.BackColor = value; } }
+
         protected override void OnContextMenuStripChanged(EventArgs e)
         {
             base.OnContextMenuStripChanged(e);