diff --git a/src/MaaWpfGui/Main/AsstProxy.cs b/src/MaaWpfGui/Main/AsstProxy.cs
index ac39296fed..3e004af57d 100644
--- a/src/MaaWpfGui/Main/AsstProxy.cs
+++ b/src/MaaWpfGui/Main/AsstProxy.cs
@@ -604,12 +604,7 @@ namespace MaaWpfGui.Main
                         }
                     }
 
-                    bool buy_wine = false;
-                    if (_latestTaskId.ContainsKey(TaskType.Mall) && Instances.SettingsViewModel.DidYouBuyWine())
-                    {
-                        buy_wine = true;
-                    }
-
+                    bool buy_wine = _latestTaskId.ContainsKey(TaskType.Mall) && Instances.SettingsViewModel.DidYouBuyWine();
                     _latestTaskId.Clear();
 
                     Instances.TaskQueueViewModel.ResetFightVariables();
@@ -1253,29 +1248,27 @@ namespace MaaWpfGui.Main
             string host = address_[0].Equals("emulator") ? "127.0.0.1" : address_[0];
             int port = int.Parse(address_[1]);
 
-            using (var client = new TcpClient())
+            using var client = new TcpClient();
+            try
             {
-                try
-                {
-                    IAsyncResult result = client.BeginConnect(host, port, null, null);
-                    bool success = result.AsyncWaitHandle.WaitOne(TimeSpan.FromSeconds(.5));
+                IAsyncResult result = client.BeginConnect(host, port, null, null);
+                bool success = result.AsyncWaitHandle.WaitOne(TimeSpan.FromSeconds(.5));
 
-                    if (success)
-                    {
-                        client.EndConnect(result);
-                        return true;
-                    }
-                    else
-                    {
-                        client.Close();
-                        return false;
-                    }
-                }
-                catch (Exception)
+                if (success)
                 {
+                    client.EndConnect(result);
+                    return true;
+                }
+                else
+                {
+                    client.Close();
                     return false;
                 }
             }
+            catch (Exception)
+            {
+                return false;
+            }
         }
 
         /// <summary>
diff --git a/src/MaaWpfGui/Services/Web/HttpService.cs b/src/MaaWpfGui/Services/Web/HttpService.cs
index e8adae7b66..1ebd9d0330 100644
--- a/src/MaaWpfGui/Services/Web/HttpService.cs
+++ b/src/MaaWpfGui/Services/Web/HttpService.cs
@@ -108,7 +108,7 @@ namespace MaaWpfGui.Services.Web
         {
             var response = await GetAsync(uri, extraHeader);
 
-            if (response == null || response.StatusCode != HttpStatusCode.OK)
+            if (response?.StatusCode != HttpStatusCode.OK)
             {
                 return null;
             }
@@ -120,7 +120,7 @@ namespace MaaWpfGui.Services.Web
         {
             var response = await GetAsync(uri, extraHeader);
 
-            if (response == null || response.StatusCode != HttpStatusCode.OK)
+            if (response?.StatusCode != HttpStatusCode.OK)
             {
                 return null;
             }
@@ -183,7 +183,7 @@ namespace MaaWpfGui.Services.Web
 
             var response = await GetAsync(uri, extraHeader: new Dictionary<string, string> { { "Accept", contentType } }, httpCompletionOption: HttpCompletionOption.ResponseHeadersRead);
 
-            if (response == null || response.StatusCode != HttpStatusCode.OK)
+            if (response?.StatusCode != HttpStatusCode.OK)
             {
                 return false;
             }
@@ -264,7 +264,6 @@ namespace MaaWpfGui.Services.Web
             }
 
             HttpClient client = new HttpClient(handler);
-            client = new HttpClient(handler);
             client.DefaultRequestHeaders.Add("User-Agent", UserAgent);
             client.Timeout = TimeSpan.FromSeconds(15);
             return client;