using System;

using System.Collections.Generic;

​

public class Program

{

    public class Student

    {

        public string Name {get;set;}

        public int ID {get;set;}

        public int Grade {get;set;}

        public class Address

            {

            public string Street;

            public int Number;

            public long PostCode;

            public string City;

            public Address (string street, int number, long postCode, string city)

            {

                Street = street;

                Number = number;

                PostCode = postCode;

                City = city;

                //public override ToString ()                                                       hätte versucht diese ToString methode zu überschreiben aber das check ich nicht so ganz

                //  {

                //  string result = Street + "\t" + Number + "\t" + PostCode + "\t" + City;

                //  return result;

                //  }

            }

            }

        public Address addressOfStudent {get; set;}

        public Student (string name, int id, int grade, string street, int number, long postCode, string city)

        {

            Name = name;

            ID = id;

            Grade = grade;

            addressOfStudent = new Address(street, number, postCode, city);

        }   

    }

    public static void Main()

    {

        Student student1 = new Student ("Jil", 23, 1, "Mariahilferstrasse", 4, 1050, "Vienna");

        Student student2 = new Student ("Charlotte", 24, 2, "Währingerstrasse", 23, 1090, "Vienna");

        Student student3 = new Student ("Tamara", 25, 2, "Opernring", 2, 1060, "Vienna");

        List<Student> studentList = new List<Student>();

        studentList.Add(student1);

        studentList.Add(student2);

        studentList.Add(student3);

        double sum =0;

        foreach (Student s in studentList)

            sum += s.Grade;

        double avg = sum / studentList.Count;

        Console.WriteLine("The average grade is: " + avg + "\n");

        foreach (Student s in studentList)                                                      //diese zwei zeilen sind meine alternativlösung zu diesem ToString Überschreibungsversuch

            Console.WriteLine(s.addressOfStudent.Street + "\t" + s.addressOfStudent.Number + "\t" + s.addressOfStudent.PostCode + "\t" + s.addressOfStudent.City + "\n");

        //foreach (Student s in studentList)        dieser teil würde zu dem geänderten ToString Versuch gehören

        //  Console.WriteLine(addressOfStudent);

    }

}