Get DateTime for the nth Sunday after today

Question

I'm using the following to get the current week number:

var weekNo = CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(DateTime.UtcNow,
                                                  CalendarWeekRule.FirstFullWeek,
                                                  DayOfWeek.Sunday);

And I want to return the DateTime representing the first day of the nth week after today.

e.g. when n = 2, I would want the DateTime representing the Sunday after next.

Is there a way I can do this in C#?