public List <Group> GetAllCourseGroups()
{
return(StudentInGroups
.Where(sig => sig.Group != null && !sig.Group.IsExam &&
!BerthTypes.Hide.Contains(sig.BerthType_TC) && sig.Group.Course_TC != CourseTC.ZaochSpec).Select(x => x.Group)
.OrderByDescending(g => g.DateBeg).ToList());
}
public IOrderedEnumerable <StudentInGroup> GetPaidGroups()
{
return(StudentInGroups
.Where(sig => sig.Group != null &&
sig.Group.Course_TC != CourseTC.ZaochSpec &&
BerthTypes.AllPaid.Contains(sig.BerthType_TC))
.OrderByDescending(sig => sig.Group.DateBeg));
}