public void DeleteUserSelectedPeriods()
 {
     foreach (UserSelectedPeriodUsage periodUsage in Enum.GetValues(typeof(UserSelectedPeriodUsage)))
     {
         PeriodManager.AddUserSelectedPeriods(GetContext(), PeriodManagerTest.GetSomePeriodIds(GetContext()), periodUsage);
         PeriodManager.DeleteUserSelectedPeriods(GetContext());
     }
 }