public static bool IsGroupValid(string groupName)
{
using (MarksContext db = new MarksContext())
{
return(db.Students.Any(i => i.Group.Equals(groupName)));
}
}
public static bool IsCourseValid(string courseName)
{
using (MarksContext db = new MarksContext())
{
return(!db.Courses.Any(i => i.Name.Equals(courseName)));
}
}
public Student()
{
Courses = new HashSet <Course>();
if (Id != 0)
{
using (MarksContext db = new MarksContext())
{
Marks = db.Marks.Where(i => i.StudentId == Id).AsEnumerable();
}
}
}
