数据请求返回共用类（公共）

public class RequestResult
    {
        public bool IsSuccess { get; set; }

        public string Message { get; set; }

        public void OnSuccess(String msg = null)
        {
            IsSuccess = true;
            Message = msg;
        }

        public virtual RequestResult OnError(string errorMessage = "")
        {
            this.IsSuccess = false;
            this.Message = errorMessage;
            return this;
        }
    }


    public class RequestResult<T> : RequestResult
    {

        public T Data { get; set; }

        public RequestResult()
        {
            IsSuccess = true;
        }

        public RequestResult(bool isSuccess)
        {
            IsSuccess = isSuccess;
        }

        public new RequestResult<T> OnError(string errorMessage = "")
        {
            base.OnError(errorMessage);
            return this;
        }

        public RequestResult<T> OnSuccess(T data = default(T), String msg = null)
        {
            base.OnSuccess(msg);
            Data = data;
            return this;
        }
    }