Getting start date of the current week

To get the start date of the current week, use below function

 public static DateTime StartDateOfCurrentWeek(DateTime input, DayOfWeek startOfWeek)
    {
        int delta = startOfWeek - input.DayOfWeek;
        return input.AddDays(delta);
    }

Call this function like this

Response.Write(StartDateOfCurrentWeek(DateTime.Now, DayOfWeek.Sunday));

Here the parameters of this function are Current Date and starting day of the week.

Thanks