修复多个未使用字段和变量的编译器警告

Windows/CS/Framework4.0/Toprie/Toprie/V8.cs

@@ -130,14 +130,12 @@ namespace JoyD.Windows.CS.Toprie
         // 私有字段
         private string deviceIp;
         private Socket socket;
-        private bool isConnected;
         private static bool isSdkInitialized = false;
         private static Dictionary<string, V8> deviceInstances = new Dictionary<string, V8>();
 
         public V8(string ip)
         {
             deviceIp = ip;
-            isConnected = false;
         }
 
         ~V8()