While pStartDay.DayOfWeek <> 1
    pStartDay = pStartDay.AddDays(-1)
End While

While pEndDay.DayOfWeek <> 0
    pEndDay = pEndDay.AddDays(1)
End While

while (endDay.DayOfWeek != DayOfWeek.Sunday)
        {

        }

while (endDay.DayOfWeek != ((DayOfWeek)1))
{

}