//repository to edit the student details public void Update(int studentId) { var getStudent = _studentRepository.StudentDetails(studentId); var studentList = _studentRepository.GetStudentDetails(studentId); var groupByName = studentList.GroupBy(i => i.Id).Select(y => new { Key = y.Key, Value = y.ToList() }).ToList(); foreach (var p in groupByName) { Console.WriteLine("\nStudent ID : {0} Name : {1} Age : {2}\n", p.Key, p.Value[0].Name, p.Value[0].Age); p.Value.ForEach(i => Console.WriteLine("{0} \t\t {1}\t ", i.Subject, i.Mark)); } Console.WriteLine("Press 1 to change personal details and 2 to change subject details"); var dataValue = Convert.ToInt32(Console.ReadLine()); if (dataValue == 1) { try { Console.WriteLine(Message.edit1); Console.WriteLine(Message.changeNameAge); Int32 option = Convert.ToInt32(Console.ReadLine()); if (option == 1) { Console.WriteLine(Message.name); var newName = Console.ReadLine(); getStudent.Name = newName; } else if (option == 2) { Console.WriteLine(Message.age); var newAge = Convert.ToInt32(Console.ReadLine()); getStudent.Age = Convert.ToInt32(newAge); } else if (option == 3) { Console.WriteLine(Message.name); string newName = Console.ReadLine(); Console.WriteLine(Message.age); Int32 newAge = Convert.ToInt32(Console.ReadLine()); getStudent.Name = newName; getStudent.Age = newAge; } else { Console.WriteLine(Message.validNo); } _studentRepository.Update(getStudent); } catch (Exception e) { Console.WriteLine(e); } } else if (dataValue == 2) { var StudentId = getStudent.Id; Console.WriteLine("Please choose a subject to change the mark"); Console.WriteLine("English\nHindi\nMalayalam\n"); string subName = Console.ReadLine(); var includeStudetSubject = _markRepository.IncludeStudentSubject(StudentId, subName); if (includeStudetSubject != null) { Console.WriteLine("Please enter new score for {0}", subName); includeStudetSubject.Score = Convert.ToInt16(Console.ReadLine()); _markRepository.Update(includeStudetSubject); } // _subjectRepository.Update(StudentId); } _studentRepository.SaveChanges(); }