用一个对象封装程序的返回信息

/// <summary>
    /// 错误信息
    /// </summary>
    public class Error : DataBase
    {
        /// <summary>
        /// 错误码
        /// 返回为空，表示调用成功
        /// </summary>
        public string Code { get; set; }

        /// <summary>
        /// 错误信息
        /// 返回为空，表示调用成功
        /// </summary>
        public string Message { get; set; }

        /// <summary>
        /// 构造函数
        /// </summary>
        public Error()
        {
        }

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="code">错误码</param>
        /// <param name="message">错误信息</param>
        public Error(string code, string message)
        {
            this.Code = code;
            this.Message = message;
        }

        public Error(int code, string message)
            : this(code.ToString(), message)
        {
        }

        public static Error Empty
        {
            get
            {
                return new Error();
            }
        }
    }

public class SyncError : DataBase
    {
        /// <summary>
        /// 错误信息(显示给客户)
        /// </summary>
        public string Message { get; set; }

        private List<SubSyncError> subSyncErrors;

        public List<SubSyncError> SubSyncErrors
        {
            get { return subSyncErrors; }
            set { subSyncErrors = value; }
        }
    }

 public class SubSyncError
    {
       /// <summary>
        /// 错误信息(显示给客户)
       /// </summary>
       public string Message { get; set; }

        private string errorCode;

        public string ErrorCode
        {
            get { return errorCode; }
            set { errorCode = value; }
        }

        private string errorMsg;

        public string ErrorMsg
        {
            get { return errorMsg; }
            set { errorMsg = value; }
        }

        private string subErrorCode;

        public string SubErrorCode
        {
            get { return subErrorCode; }
            set { subErrorCode = value; }
        }

        private string subErrorMsg;

        public string SubErrorMsg
        {
            get { return subErrorMsg; }
            set { subErrorMsg = value; }
        }
    }