diff --git a/System.Application.SteamTools.Client.Desktop.Avalonia.App/App.axaml.cs b/System.Application.SteamTools.Client.Desktop.Avalonia.App/App.axaml.cs
index 0718ad590..320df52cc 100644
--- a/System.Application.SteamTools.Client.Desktop.Avalonia.App/App.axaml.cs
+++ b/System.Application.SteamTools.Client.Desktop.Avalonia.App/App.axaml.cs
@@ -213,12 +213,38 @@ namespace System.Application.UI
 
         public static async void SetClipboardText(string s) => await Current.Clipboard.SetTextAsync(s);
 
-        public Window? MainWindow { get; set; }
+        Window? mMainWindow;
+
+        public Window MainWindow
+        {
+            get
+            {
+                Window? mainWindow = null;
+
+                if (Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+                {
+                    mainWindow = desktop.MainWindow;
+                }
+
+                if (mainWindow == null)
+                {
+                    mainWindow = mMainWindow ?? throw new ArgumentNullException(nameof(mainWindow));
+                }
+
+                return mainWindow;
+            }
+            set
+            {
+                mMainWindow = value;
+            }
+        }
 
         public void ShowChildWindow(object window)
         {
             if (window is Window w)
+            {
                 w.ShowDialog(MainWindow);
+            }
         }
 
         /// <summary>
diff --git a/System.Application.SteamTools.Client.Desktop.Avalonia/Application/Services/Implementation/MessageWindowServiceImpl.cs b/System.Application.SteamTools.Client.Desktop.Avalonia/Application/Services/Implementation/MessageWindowServiceImpl.cs
index b9c6a4516..887731e25 100644
--- a/System.Application.SteamTools.Client.Desktop.Avalonia/Application/Services/Implementation/MessageWindowServiceImpl.cs
+++ b/System.Application.SteamTools.Client.Desktop.Avalonia/Application/Services/Implementation/MessageWindowServiceImpl.cs
@@ -1,6 +1,7 @@
 using Avalonia.Controls;
 using Avalonia.Threading;
 using System.Application.UI;
+using System.Application.UI.ViewModels;
 using System.Application.UI.ViewModels.Windows;
 using System.Application.UI.Windows;
 using System.Threading.Tasks;
@@ -11,7 +12,7 @@ namespace System.Application.Services.Implementation
     {
         public Task<bool> ShowDialog(string messageBoxText)
         {
-           return ShowDialog(messageBoxText, "", false);
+            return ShowDialog(messageBoxText, "", false);
         }
 
         public Task<bool> ShowDialog(string messageBoxText, string caption)
@@ -21,7 +22,7 @@ namespace System.Application.Services.Implementation
 
         public Task<bool> ShowDialog(string messageBoxText, string caption, bool isCancelcBtn)
         {
-            return MainThreadDesktop.InvokeOnMainThreadAsync<bool>(() =>
+            return MainThreadDesktop.InvokeOnMainThreadAsync(() =>
             {
                 var dialog = new MessageWindowViewModel
                 {
@@ -34,5 +35,26 @@ namespace System.Application.Services.Implementation
                 return dialog.DialogResult;
             });
         }
+
+        static Type GetWindowType(IMessageWindowService.CustomWindow customWindow) => customWindow switch
+        {
+            IMessageWindowService.CustomWindow.MessageBox => typeof(MessageWindowViewModel),
+            _ => throw new ArgumentOutOfRangeException(nameof(customWindow), customWindow, null),
+        };
+
+        public Task Show(IMessageWindowService.CustomWindow customWindow, ViewModelBase? dataContext = null)
+        {
+            return MainThreadDesktop.InvokeOnMainThreadAsync(() =>
+            {
+                var windowType = GetWindowType(customWindow);
+                var window = (Window)Activator.CreateInstance(windowType);
+                if (dataContext != null)
+                {
+                    window.DataContext = dataContext;
+                }
+                window.WindowStartupLocation = WindowStartupLocation.CenterScreen;
+                AppHelper.Current.ShowChildWindow(window);
+            });
+        }
     }
 }
\ No newline at end of file
diff --git a/System.Application.SteamTools.Client.Desktop/Services/IMessageWindowService.cs b/System.Application.SteamTools.Client.Desktop/Services/IMessageWindowService.cs
index 333178935..02e172d01 100644
--- a/System.Application.SteamTools.Client.Desktop/Services/IMessageWindowService.cs
+++ b/System.Application.SteamTools.Client.Desktop/Services/IMessageWindowService.cs
@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System.Application.UI.ViewModels;
+using System.Threading.Tasks;
 using System.Windows;
 
 namespace System.Application.Services
@@ -28,5 +29,16 @@ namespace System.Application.Services
         /// <param name="button">一个 <see cref="MessageBoxButtonCompat"/> 值，用于指定要显示哪个按钮或哪些按钮。</param>
         /// <returns>一个 <see cref="MessageBoxResultCompat"/> 值，用于指定用户单击了哪个消息框按钮。</returns>
         Task<bool> ShowDialog(string messageBoxText, string caption, bool isCancelcBtn);
+
+        Task Show(CustomWindow window, ViewModelBase? dataContext = null);
+
+        public enum CustomWindow : byte
+        {
+            MessageBox,
+
+            XXWindow,
+
+            XXXWindow,
+        }
     }
 }
\ No newline at end of file