diff --git a/src/ST.Client.Desktop.Avalonia.App/App.axaml.cs b/src/ST.Client.Desktop.Avalonia.App/App.axaml.cs
index 74384befc..7dfe8628b 100644
--- a/src/ST.Client.Desktop.Avalonia.App/App.axaml.cs
+++ b/src/ST.Client.Desktop.Avalonia.App/App.axaml.cs
@@ -242,12 +242,12 @@ namespace System.Application.UI
                         IsNotOfficialChannelPackageWarning();
                     }
                 }
+
+                desktop.MainWindow =
 #if !UI_DEMO
-                if (Program.IsMinimize)
-                    desktop.MainWindow = null;
-                else
+                    Program.IsMinimize ? null :
 #endif
-                    desktop.MainWindow = MainWindow;
+                    MainWindow;
 
                 desktop.Startup += Desktop_Startup;
                 desktop.Exit += ApplicationLifetime_Exit;