public void AddCourseStudents(CourseStudent courseStudent)
{
CourseStudent dbcs = dbContext.CourseStudents.FirstOrDefault(cs => cs.CourseId == courseStudent.CourseId && cs.StudentId == courseStudent.StudentId);
if (dbcs == null)
{
dbContext.CourseStudents.Add(dbcs);
}
}
public CourseStudent AddStudent(Student student)
{
if (student.Courses.Contains(this))
{
return(null);
}
else
{
CourseStudent cs = new CourseStudent(this, student);
CourseStudents.Add(cs);
student.CourseStudents.Add(cs);
return(cs);
}
}
public CourseStudent DeleteStudent(Student student)
{
if (!student.Courses.Contains(this))
{
return(null);
}
else
{
CourseStudent cs = CourseStudents.FirstOrDefault(
cst => cst.CourseId == CourseId && cst.StudentId == student.StudentId);
CourseStudents.Remove(cs);
student.CourseStudents.Remove(cs);
return(cs);
}
}
