diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/DeviceManager.cs b/Windows/CS/Framework4.0/Toprie/Toprie/DeviceManager.cs
index 31cb5fb..d51ce5f 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/DeviceManager.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/DeviceManager.cs
@@ -169,9 +169,9 @@ namespace JoyD.Windows.CS.Toprie
         // 当前设备ID
         private int _currentDeviceId = -1;
         // 默认设备IP
-        private string _deviceIp = "192.168.100.2";
+        private readonly string _deviceIp = "192.168.100.2";
         // 设备端口
-        private int _devicePort = 8080;
+        private readonly int _devicePort = 8080;
         // 设备连接状态
         private ConnectionStatus _connectionStatus = ConnectionStatus.Disconnected;
         // 是否已初始化
@@ -179,7 +179,7 @@ namespace JoyD.Windows.CS.Toprie
         // 是否已释放
         private bool _isDisposed = false;
         // 图像模式
-        private ImageMode _currentImageMode = ImageMode.Infrared;
+        private readonly ImageMode _currentImageMode = ImageMode.Infrared;
         // 当前色彩模式
         private PaletteType _currentPaletteType = PaletteType.WhiteHot;
         // 当前视频模式
@@ -195,15 +195,15 @@ namespace JoyD.Windows.CS.Toprie
         // 最大重连尝试次数
         public static int MaxReconnectAttempts = 5;
         // 连接检查定时器
-        private System.Threading.Timer _connectionCheckTimer;
+        private readonly System.Threading.Timer _connectionCheckTimer;
         // 心跳定时器
-        private System.Threading.Timer _heartbeatTimer;
+        private readonly System.Threading.Timer _heartbeatTimer;
         // 连接超时时间（毫秒）
         private const int ConnectionTimeout = 5000;
         // 连接检查间隔（毫秒）
         private const int ConnectionCheckInterval = 5000;
         // 心跳间隔（毫秒）
-        private int _heartbeatInterval = 5000;
+        private readonly int _heartbeatInterval = 5000;
         // 最后接收数据时间戳
         private DateTime _lastDataReceivedTime = DateTime.MinValue;
         // 数据接收超时时间（毫秒）
@@ -212,7 +212,7 @@ namespace JoyD.Windows.CS.Toprie
         // 该变量已在文件上方定义，删除重复实现
 
         // 停止请求事件
-        private ManualResetEvent _stopRequested = new ManualResetEvent(false);
+        private readonly ManualResetEvent _stopRequested = new ManualResetEvent(false);
         // 缓冲区
         private byte[] _imageBuffer = new byte[4096];
         // 图像数据累积缓冲区
@@ -220,7 +220,7 @@ namespace JoyD.Windows.CS.Toprie
         // 多部分请求边界
         private string _multipartBoundary = string.Empty;
         // 锁对象
-        private object _lockObject = new object();
+        private readonly object _lockObject = new object();
         // 是否启用自动重连
         private bool _isAutoReconnectEnabled = true;
         // 最大重连次数
diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/V8.cs b/Windows/CS/Framework4.0/Toprie/Toprie/V8.cs
index 2a7c398..3548411 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/V8.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/V8.cs
@@ -131,7 +131,7 @@ namespace JoyD.Windows.CS.Toprie
         private string deviceIp;
         private Socket socket = null;
         private static bool isSdkInitialized = false;
-        private static Dictionary<string, V8> deviceInstances = new Dictionary<string, V8>();
+        private static readonly Dictionary<string, V8> deviceInstances = new Dictionary<string, V8>();
 
         public V8(string ip)
         {