public ServerInfo(SimpleJson.JsonObject obj)
 {
     id = Convert.ToInt32(obj ["id"]);
     name = Convert.ToString(obj ["name"]);
     address = Convert.ToString(obj ["address"]);
     port = Convert.ToInt32(obj ["port"]);       
     if (obj.ContainsKey("status"))
     {
         status = Convert.ToInt32(obj ["status"]);
     }
     if (obj.ContainsKey("content"))
     {
         recommond = Convert.ToString(obj ["content"]);
     }
 }