[.NET] [C#] - Telefonbuch

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace telefonbuch
{
 class Program
 {
 static void Main(string[] args)
 {
 Menue(); 
 }
 static void WriteFile(Adresse ein)
 { 
 StreamWriter schreiben = new StreamWriter(@"telebuch.txt", true); 
 schreiben.Write("{0,-16}", ein.name);
 schreiben.Write("{0,-19}", ein.Strasse);
 schreiben.Write("{0,-9}", ein.plz);
 schreiben.Write("{0,-17}", ein.Ort);
 schreiben.WriteLine("{0,-15}", ein.Telefon); 
 schreiben.Close(); 
 }
 static void ReadFile()
 { 
 StreamReader lesen = new StreamReader("telebuch.txt");
 while (!lesen.EndOfStream)
 {
 Console.WriteLine(lesen.ReadLine()); 
 }
 lesen.Close();
 Console.ReadLine();
 } 
 static void Menue()
 { 
 bool Ende = true; 
 string eingabe;
 Console.Clear();
 Console.WriteLine("\n\n\t \t\t Menue \n\n"); 
 Console.WriteLine("\t \t -------------------------------");
 Console.Write("\t \t |#############################|");
 Console.Write("\n \t \t |# N - Neue Adresse eingeben #| \n \t"); 
 Console.Write("\t |# A - Datensätze anzeigen #| \n \t \t |# B - Beenden #|" ); 
 Console.Write("\n \t \t |#############################|");
 Console.WriteLine("\n \t \t -------------------------------"); 
 
 do
 {
 switch (eingabe = Console.ReadLine().ToUpper())
 {
 case "N":
 Adresse ady = new Adresse("Max", "Mustermann", "Musterstrasse", "Musterstadt", "0123456789");
 Console.Write("Name: ");
 ady.name = Console.ReadLine();
 Console.Write("Strasse: ");
 ady.Strasse = Console.ReadLine();
 Console.Write("PLZ: ");
 ady.plz = Console.ReadLine();
 Console.Write("Ort: ");
 ady.Ort = Console.ReadLine();
 Console.Write("Telefonnr.: ");
 ady.Telefon = Console.ReadLine();
 WriteFile(ady); 
 Console.WriteLine("\nDatensatz gespeichert...");
 Console.ReadLine();
 Menue(); 
 break;
 
 case "A":
 Console.WriteLine("\n\nDatensatzausgabe");
 Console.WriteLine("------------------\n\n");
 Console.WriteLine("+--------------+------------------+--------+----------------+--------------+");
 Console.WriteLine("| Name | Strasse | PLZ | Ort | Telefon |");
 Console.WriteLine("+--------------+------------------+--------+----------------+--------------+");
 ReadFile(); 
 Menue(); 
 break;
 
 case "B":
 Ende = true;
 break; 
 default:
 Console.WriteLine("Fehlerhafte Eingabe!");
 Console.ReadLine();
 Menue();
 break;
 }
 } while (!Ende); 
 }

 }
}

public class Adresse
{
 public string name;
 public string plz;
 public string Strasse; 
 public string Ort;
 public string Telefon;

 public Adresse(string n, string p, string s, string o, string t)
 {
 this.name = n;
 this.plz = p;
 this.Strasse = s; 
 this.Ort = o;
 this.Telefon = t;
 }
}