How to get last Friday of month(s) using .NET

.net, c#, c#-3.0

Solution

You already have the list of Fridays in the given range. Now just query this again like this:

List<DateTime> lastFridays = (from day in fridays
                              where day.AddDays(7).Month != day.Month
                              select day).ToList<DateTime>();

Hope this helps.

Problem

I have a function that returns me only the fridays from a range of dates ``` public static List<DateTime> GetDates(DateTime startDate, int weeks) { int days = weeks * 7; //Get the whole date range List<DateTime> dtFulldateRange = Enumerable.Range(-days, days).Select(i => startDate.AddDays(i)).ToList(); //Get only the fridays from the date range List<DateTime> dtOnlyFridays = (from dtFridays in dtFulldateRange where dtFridays.DayOfWeek == DayOfWeek.Friday select dtFridays).ToList(); return dtOnlyFridays; } ``` Purpose of the function: "List of dates from the Week number specified till the StartDate i.e. If startdate is 23rd April, 2010 and the week number is 1,then the program should return the dates from 16th April, 2010 till the startddate". I am calling the function as: ``` DateTime StartDate1 = DateTime.ParseExact("20100430", "yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture); List<DateTime> dtList = Utility.GetDates(StartDate1, 4).ToList(); ``` Now the requirement has changed a bit. I need to find out only the last Fridays of every month. The input to the function will remain same.

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