Question

I have a Generic DateTime List

List<DateTime> **PreviousDates** = //Some List of Dates

Now i want to Get all the Dates in the PreviousDates List whose Month and Year equals the GivenDate’s Month & Year. no matter what the Day & Time are…

I Tried using List.Contains() method, but it checks all Parts of the Date, i want to check only Month&Year..

Help Me!

Thanks
Pradeep

Answer 1

You can create DateTime values for the start and end of the interval:

DateTime start = new DateTime(GivenDate.Year, GivenDate.Month, 1);
DateTime end = start.AddMonths(1);

Now you can easily select the items that is inside the interval:

List<DateTime> inside =
  PreviousDates
  .Where(d => d >= start && d < end)
  .ToList();

(You could of course compare the GivenDate.Year and GivenDate.Month values to d.Year and d.Month in the Where, but that’s a more complex and less efficient condition.)