diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index cd3f18f6..d4a97f5b 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 fbdb9a4a..de69ba01 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 6f175c66..d46051b3 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 134b92b3..2e2717a2 100644
Binary files a/Bin/netcoreapp3.1/SunnyUI.dll and b/Bin/netcoreapp3.1/SunnyUI.dll differ
diff --git a/SunnyUI/Static/UMessageTip.cs b/SunnyUI/Static/UMessageTip.cs
index b6bf77ad..ccb11855 100644
--- a/SunnyUI/Static/UMessageTip.cs
+++ b/SunnyUI/Static/UMessageTip.cs
@@ -1004,8 +1004,13 @@ namespace Sunny.UI
             {
                 if (_hInstance == IntPtr.Zero)
                 {
-                    _hInstance = Marshal.GetHINSTANCE(Assembly.GetEntryAssembly()?.ManifestModule);
+                    Assembly assembly = Assembly.GetEntryAssembly();
+                    if (assembly != null)
+                    {
+                        _hInstance = Marshal.GetHINSTANCE(assembly.ManifestModule);
+                    }
                 }
+
                 return _hInstance;
             }
         }