How can I run a quartz schedule on mondays and tuesdays every two weeks?

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Visual-Studio

C#3.5

quartz.net

I used the below way to run the schedule on every two weeks on mondays.

ITrigger trigger = TriggerBuilder.Create()
                                    .StartAt(DateBuilder.DateOf(StartHour, StartMinute, StartSeconds, StartDate, StartMonth, StartYear))
                                    .WithCalendarIntervalSchedule(x => x.WithIntervalInWeeks(Int32.Parse(nWeekInterval)))
                                    .EndAt(DateBuilder.DateOf(0, 0, 0, EndDay, EndMonth, EndYear))
                                    .Build();

But how can I use a single schedule to run on mondays and tuesdays as well. Please advice.