diff --git a/src/c#/GeneralUpdate.Client/Program.cs b/src/c#/GeneralUpdate.Client/Program.cs
index 167e7e36..328636ac 100644
--- a/src/c#/GeneralUpdate.Client/Program.cs
+++ b/src/c#/GeneralUpdate.Client/Program.cs
@@ -1,5 +1,7 @@
-using System.Text;
+using System.Diagnostics;
+using System.Text;
 using GeneralUpdate.ClientCore;
+using GeneralUpdate.ClientCore.Hubs;
 using GeneralUpdate.Common.Download;
 using GeneralUpdate.Common.Internal;
 using GeneralUpdate.Common.Internal.Bootstrap;
@@ -12,7 +14,7 @@ internal class Program
     {
         static async Task Main(string[] args)
         {
-            try
+            /*try
             {
                 Console.WriteLine($"主程序初始化，{DateTime.Now}！");
                 Console.WriteLine("当前运行目录：" + Thread.GetDomain().BaseDirectory);
@@ -55,7 +57,7 @@ static async Task Main(string[] args)
             catch (Exception e)
             {
                 Console.WriteLine(e.Message + "\n" + e.StackTrace);
-            }
+            }*/
 
             /*var paramsOSS = new GlobalConfigInfoOSS();
             paramsOSS.Url = "http://192.168.50.203/versions.json";
@@ -65,13 +67,13 @@ static async Task Main(string[] args)
             paramsOSS.Encoding = Encoding.UTF8.WebName;
             GeneralClientOSS.Start(paramsOSS);*/
 
-            /*var hub = new UpgradeHubService("http://localhost:5000/UpgradeHub"
-                , null,"a84d21d4-3448-48d4-b418-12c5a7a039cd");
+            var hub = new UpgradeHubService("http://localhost:5000/UpgradeHub"
+                , null,"dfeb5833-975e-4afb-88f1-6278ee9aeff6");
             hub.AddListenerReceive((message) =>
             {
                 Debug.WriteLine(message);
             });
-            await hub.StartAsync();*/
+            await hub.StartAsync();
 
             /*Task.Run(async () =>
            {
diff --git a/src/c#/GeneralUpdate.ClientCore/Hubs/UpgradeHubService.cs b/src/c#/GeneralUpdate.ClientCore/Hubs/UpgradeHubService.cs
index 2e2e677a..a583cfec 100644
--- a/src/c#/GeneralUpdate.ClientCore/Hubs/UpgradeHubService.cs
+++ b/src/c#/GeneralUpdate.ClientCore/Hubs/UpgradeHubService.cs
@@ -1,7 +1,10 @@
 using System;
 using System.Diagnostics;
 using System.Threading.Tasks;
+using GeneralUpdate.Common.Internal.JsonContext;
+using Microsoft.AspNetCore.SignalR;
 using Microsoft.AspNetCore.SignalR.Client;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace GeneralUpdate.ClientCore.Hubs;
 
@@ -11,23 +14,33 @@ namespace GeneralUpdate.ClientCore.Hubs;
 /// <param name="url">Subscription address, for example: http://127.0.0.1/UpgradeHub</param>
 /// <param name="token">ID4 authentication token string.</param>
 /// <param name="args">Parameters to be sent to the server upon connection (recommended as a JSON string).</param>
-public class UpgradeHubService(string url, string? token = null, string? appkey = null) : IUpgradeHubService
+public class UpgradeHubService : IUpgradeHubService
 {
     private const string Onlineflag = "Online";
     private const string ReceiveMessageflag = "ReceiveMessage";
-    
-    private readonly HubConnection? _connection = new HubConnectionBuilder()
-        .WithUrl(url, config =>
+    private HubConnection? _connection;
+
+    public UpgradeHubService(string url, string? token = null, string? appkey = null)
+        => _connection = BuildHubConnection(url, token, appkey);
+
+    private HubConnection BuildHubConnection(string url, string? token = null, string? appkey = null)
+    {
+        var builder = new HubConnectionBuilder()
+            .WithUrl(url, config =>
+            {
+                if (!string.IsNullOrWhiteSpace(token))
+                    config.AccessTokenProvider = () => Task.FromResult(token);
+
+                if (!string.IsNullOrWhiteSpace(appkey))
+                    config.Headers.Add("appkey", appkey);
+            }).WithAutomaticReconnect(new RandomRetryPolicy());
+        builder.Services.Configure<JsonHubProtocolOptions>(o =>
         {
-            if (!string.IsNullOrWhiteSpace(token))
-                config.AccessTokenProvider = () => Task.FromResult(token);
-            
-            if (!string.IsNullOrWhiteSpace(appkey))
-                config.Headers.Add("appkey", appkey);
-        })
-        .WithAutomaticReconnect(new RandomRetryPolicy())
-        .Build();
-    
+            o.PayloadSerializerOptions.TypeInfoResolverChain.Insert(0, PacketJsonContext.Default);
+        });
+        return builder.Build();
+    }
+
     public void AddListenerReceive(Action<string> receiveMessageCallback)
         => _connection?.On(ReceiveMessageflag, receiveMessageCallback);
 
diff --git a/src/c#/GeneralUpdate.Common/Internal/JsonContext/PacketJsonContext.cs b/src/c#/GeneralUpdate.Common/Internal/JsonContext/PacketJsonContext.cs
new file mode 100644
index 00000000..7b64503d
--- /dev/null
+++ b/src/c#/GeneralUpdate.Common/Internal/JsonContext/PacketJsonContext.cs
@@ -0,0 +1,7 @@
+using System.Text.Json.Serialization;
+using GeneralUpdate.Common.Shared.Object;
+
+namespace GeneralUpdate.Common.Internal.JsonContext;
+
+[JsonSerializable(typeof(Packet))]
+public partial class PacketJsonContext : JsonSerializerContext;
\ No newline at end of file
diff --git a/src/c#/GeneralUpdate.Common/Shared/Object/Packet.cs b/src/c#/GeneralUpdate.Common/Shared/Object/Packet.cs
new file mode 100644
index 00000000..19fa1f4b
--- /dev/null
+++ b/src/c#/GeneralUpdate.Common/Shared/Object/Packet.cs
@@ -0,0 +1,40 @@
+using System;
+using System.Text.Json.Serialization;
+
+namespace GeneralUpdate.Common.Shared.Object;
+
+/// <summary>
+/// Currently used only for upgrade push.
+/// </summary>
+public class Packet
+{
+    [JsonPropertyName("Name")]
+    public string? Name { get; set; }
+
+    [JsonPropertyName("Hash")]
+    public string Hash { get; set; }
+
+    [JsonPropertyName("ReleaseDate")]
+    public DateTime? ReleaseDate { get; set; }
+
+    [JsonPropertyName("Url")]
+    public string? Url { get; set; }
+
+    [JsonPropertyName("Version")]
+    public string? Version { get; set; }
+
+    [JsonPropertyName("AppType")]
+    public int? AppType { get; set; }
+
+    [JsonPropertyName("Platform")]
+    public int? Platform { get; set; }
+
+    [JsonPropertyName("ProductId")]
+    public string? ProductId { get; set; }
+
+    [JsonPropertyName("IsForcibly")]
+    public bool? IsForcibly { get; set; }
+
+    [JsonPropertyName("IsFreeze")]
+    public bool? IsFreeze { get; set; }
+}
\ No newline at end of file