diff --git a/App.xaml.cs b/App.xaml.cs
index 00944fb..81c3a96 100644
--- a/App.xaml.cs
+++ b/App.xaml.cs
@@ -2,6 +2,9 @@ using System.Diagnostics;
 using System.Windows;
 using Microsoft.Windows.AppNotifications;
 
+// 双开 WPF + WinForms 时,Application 在两个命名空间都有,用别名强制走 WPF 的。
+using Application = System.Windows.Application;
+
 namespace WindowsGotify;
 
 public partial class App : Application
@@ -94,7 +97,7 @@ public partial class App : Application
                 Message = "Windows Gotify Agent 测试通知。",
                 Title = "Gotify 测试",
                 Priority = 5,
-                Date = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds()
+                Date = DateTimeOffset.UtcNow
             });
     }
 
@@ -106,10 +109,9 @@ public partial class App : Application
         {
             try
             {
-                var arguments = args.Arguments;
-                if (arguments.StartsWith("url=", StringComparison.OrdinalIgnoreCase))
+                // Windows App SDK 2.4.0:args.Arguments 已经是 IDictionary<string, string>,由 AddArgument(key, value) 注入
+                if (args.Arguments.TryGetValue("url", out var url) && !string.IsNullOrWhiteSpace(url))
                 {
-                    var url = Uri.UnescapeDataString(arguments[4..]);
                     Process.Start(new ProcessStartInfo
                     {
                         FileName = url,
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 2ed01d9..5e75b7e 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -6,6 +6,9 @@ using WindowsGotify.Models;
 using WindowsGotify.Services;
 using WindowsGotify.Tray;
 
+// 双开 WPF + WinForms 时,MessageBox 在两个命名空间都有,用别名强制走 WPF 的。
+using MessageBox = System.Windows.MessageBox;
+
 namespace WindowsGotify;
 
 public partial class MainWindow : Window
diff --git a/Services/ConfigService.cs b/Services/ConfigService.cs
index 6ef239f..2c08a2d 100644
--- a/Services/ConfigService.cs
+++ b/Services/ConfigService.cs
@@ -1,3 +1,4 @@
+using System.IO;
 using System.Text.Json;
 using WindowsGotify.Models;
 
diff --git a/Services/GotifyApiService.cs b/Services/GotifyApiService.cs
index a98485f..e7b7f44 100644
--- a/Services/GotifyApiService.cs
+++ b/Services/GotifyApiService.cs
@@ -1,3 +1,4 @@
+using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Text.Json;
 using WindowsGotify.Models;
diff --git a/Services/GotifyWebSocketService.cs b/Services/GotifyWebSocketService.cs
index 35f8df9..577c734 100644
--- a/Services/GotifyWebSocketService.cs
+++ b/Services/GotifyWebSocketService.cs
@@ -1,3 +1,4 @@
+using System.IO;
 using System.Net.WebSockets;
 using System.Text;
 using System.Text.Json;
@@ -18,7 +19,6 @@ public sealed class GotifyWebSocketService
     private readonly object _socketLock = new();
     private ClientWebSocket? _socket;
     private bool _running;
-    private bool _forceReconnect;
 
     /// <summary>
     /// 收到一条新消息(已去重、未越界)时触发,UI 用来追加到历史列表。
@@ -53,7 +53,7 @@ public sealed class GotifyWebSocketService
 
     public void RequestReconnect()
     {
-        _forceReconnect = true;
+        // 直接 Abort 当前 socket,ConnectAndReceiveAsync 会抛 → 外层 RunLoopAsync 自动重连
         lock (_socketLock)
         {
             try
@@ -123,7 +123,6 @@ public sealed class GotifyWebSocketService
             if (!_running || _lifetimeCts.IsCancellationRequested)
                 break;
 
-            _forceReconnect = false;
             _logger.Info($"Reconnect after {delay}s.");
             _statusChanged($"{delay}s 后重连");
 
diff --git a/Services/Logger.cs b/Services/Logger.cs
index aecabab..aca27c6 100644
--- a/Services/Logger.cs
+++ b/Services/Logger.cs
@@ -1,3 +1,5 @@
+using System.IO;
+
 namespace WindowsGotify.Services;
 
 public sealed class Logger
diff --git a/Services/NotificationService.cs b/Services/NotificationService.cs
index bcd930d..cd5edbe 100644
--- a/Services/NotificationService.cs
+++ b/Services/NotificationService.cs
@@ -44,11 +44,12 @@ public sealed class NotificationService
                         : AppNotificationSoundEvent.Default);
             }
 
-            // 把 extras 里的 client::notification.click.url 透传给通知,让 App.OnNotificationInvoked 收到 url=...
+            // 把 extras 里的 client::notification.click.url 透传给通知,让 App.OnNotificationInvoked 收到
+            // Windows App SDK 2.4.0 的 AddArgument 是 (key, value) 两参,跟 1.x 的单参 "key=value" 不一样
             var clickUrl = message.ClickUrl;
             if (!string.IsNullOrWhiteSpace(clickUrl))
             {
-                builder.AddArgument("url=" + Uri.EscapeDataString(clickUrl));
+                builder.AddArgument("url", clickUrl);
             }
 
             var notification = builder.BuildNotification();
diff --git a/Services/StateService.cs b/Services/StateService.cs
index 7335e46..f1978d7 100644
--- a/Services/StateService.cs
+++ b/Services/StateService.cs
@@ -1,3 +1,4 @@
+using System.IO;
 using System.Text.Json;
 
 namespace WindowsGotify.Services;
diff --git a/WindowsGotify.csproj b/WindowsGotify.csproj
index df780bc..6be2875 100644
--- a/WindowsGotify.csproj
+++ b/WindowsGotify.csproj
@@ -2,7 +2,8 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows10.0.19041.0</TargetFramework>
+    <SupportedOSPlatformVersion>10.0.17763.0</SupportedOSPlatformVersion>
     <UseWPF>true</UseWPF>
     <UseWindowsForms>true</UseWindowsForms>
     <Nullable>enable</Nullable>