quartz.net 根据cron表达式计算最近几次的执行时间

网上查了很久，没找到.net版本的，java的有些，后来自己看了下api，发现实现起来很简单，代码再传共享下

       /// <summary>
        /// Corn表达式的运行时间
        /// </summary>
        /// <param name="cron">表达式</param>
        /// <param name="times">计算次数</param>
        /// <param name="startTime">开始时间</param>
        /// <returns></returns>
        public static String getCronSchdule(String cron,int times, DateTimeOffset startTime)
        {
            String timeSchdule = "";
            if (!CronExpression.IsValidExpression(cron))
            {
                return "Cron is Illegal!";
            }
            try
            {
    
                ITrigger trigger1 = TriggerBuilder.Create()
   
                .WithCronSchedule(cron)
 

                .StartAt(BeginTime)

                .Build();
                DateTimeOffset? LastTime = startTime;
                Console.WriteLine(LastTime.ToString());
                for (int i =0;i< times;i++)
                {
                    DateTimeOffset? s = trigger1.GetFireTimeAfter(LastTime);
                    LastTime = s;
                    Console.WriteLine(((DateTimeOffset)s).AddHours(8).ToString());
                }
            

            }
            catch (Exception e)
            {
                timeSchdule = "unKnow Time!";
            }
            return timeSchdule;
        }

调用

getCronSchdule("0 */1 * * * ?", 10,DateTimeOffset.Now);