C#/.Net判断是否为周末/节假日

判断节假日请求的Api：http://tool.bitefu.net/jiari/

    /// 

    /// 判断是不是周末/节假日
    /// 
    /// 日期
    /// 周末和节假日返回true，工作日返回false
    public static async Task IsHolidayByDate(DateTime date)
    {
        var isHoliday = false;
        var webClient = new System.Net.WebClient();
        var PostVars = new System.Collections.Specialized.NameValueCollection
        {
            { "d", date.ToString("yyyyMMdd") }//参数
        };
        try
        {
            var day = date.DayOfWeek;

            //判断是否为周末
            if (day == DayOfWeek.Sunday || day == DayOfWeek.Saturday)
                return true;

            //0为工作日，1为周末，2为法定节假日
            var byteResult = await webClient.UploadValuesTaskAsync("http://tool.bitefu.net/jiari/", "POST", PostVars);//请求地址,传参方式,参数集合
            var result = Encoding.UTF8.GetString(byteResult);//获取返回值
            if (result == "1" || result == "2")
                isHoliday = true;
        }
        catch
        {
            isHoliday = false;
        }
        return isHoliday;
    }