Notes

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


class Program
{
public static void Main(string[] args)
{
UserInfo user = new UserInfo();
Console.WriteLine(user.Info());



}

}
public class UserInfo
{
public string Info()
{
User user = new User();
user.SetAd("Ahmet");
user.SetSoyad("Şahinler");
user.SetDogum(DateTime.Now);
user.SetTc("1111111111");
user.SetTel(new Dictionary<string, string>(){{"TEL: ","0564 846 8461"}});

return ("Ad:"+ user.GetAd()+ " Soyad:"+user.GetSoyaAd() + " Tc:"+user.GetTc()+ " Doğum Tarihi:"+user.GetDogum()+" Tel:"+user.GetTel());

}
}



public class User
{
private string Ad;
private string Soyad;
private string Tc;
DateTime Dogum;
Dictionary<string, string> Tel = new Dictionary<string, string>();

public void SetAd(string Ad){this.Ad = Ad;}
public void SetSoyad(string Soyad){this.Soyad = Soyad;}
public void SetDogum(DateTime Dogum){this.Dogum = Dogum;}
public void SetTc(string Tc){this.Tc = Tc;}
public void SetTel(Dictionary<string,string> Tel){this.Tel = Tel;}


public string GetAd(){return this.Ad;}
public string GetSoyaAd(){return this.Soyad;}
public string GetTc(){return this.Tc;}
public DateTime GetDogum(){return this.Dogum;}
public string GetTel()
{
string Tel = "";
foreach (var item in this.Tel)
{
Tel = item.Value;
}
return Tel;
}
}

public class Ogrenci
{
public string Ulke { get; set; }
public string Sehir { get; set; }
public int Puan { get; set; }

public List<Ogrenci> OgrenciList()
{
return new Ogrenci[]
{
new Ogrenci(){ Ad ="Ali", Sehir= "İstanbul",Yas = 12},
new Ogrenci(){ Ad ="Kadir", Sehir="Ankara", Yas = 14},
new Ogrenci(){ Ad ="Can", Sehir="İstanbul", Yas = 15},
new Ogrenci(){ Ad ="Yılmaz", Sehir ="İstanbul", Yas = 17},
new Ogrenci(){ Ad ="Hakan", Sehir="İzmir", Yas = 18}
}
.ToList();
}
}