C#-Code

using System;

namespace Das_Array_Telefonbuch
{
    public class Program
    {
        static void Main(string[] args)
        {
            string[,] Numbers = new string[5,4];
            int EintNr = 1;
            for (int i = 0; i < 5; i++)
            {
                Console.WriteLine("Festnetznummer: ");
                Numbers[i, 0] = Console.ReadLine();
                Console.WriteLine("HandyNummer: ");
                Numbers[i, 1] = Console.ReadLine();
                Console.WriteLine("Gesch. Tel.Nummer: ");
                Numbers[i, 2] = Console.ReadLine();
                Numbers[i, 3] = "Nr. " + EintNr;
                EintNr++;
                Console.Clear();
            }
            Console.WriteLine("LETZTER EINTRAG");
            Console.ReadKey();
            for (int j = 0; j < 5; j++)
            {
                Console.WriteLine(Numbers[j, 3]);
                Console.WriteLine("Festnetznummer       " + Numbers[j, 0]);
                Console.WriteLine("HandyNummer          " + Numbers[j, 1]);
                Console.WriteLine("Gesch. Tel.Nummer    " + Numbers[j, 2]);
                Console.WriteLine(" ");
            }
            Console.ReadKey();
            
            
        }
    }
}