C#中取到当前日期是在一年中的第几周

System.Globalization.GregorianCalendar gc = new System.Globalization.GregorianCalendar();
int weekOfYear = gc.GetWeekOfYear(DateTime.Parse("2007-06-01"),System.Globalization.CalendarWeekRule.FirstDay,DayOfWeek.Sunday);

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