C#

iTunesApp myTunes = new iTunesApp();
iTunesLib.IITPlaylist test1 = myTunes.CreateFolderInSource("test1", myTunes.LibrarySource);

iTunesLib.IITPlaylist test2= myTunes.CreateFolder("test2");

iTunesLib.IITPlaylist tempPlaylist = default(iTunesLib.IITPlaylist);
tempPlaylist = myTunes.CreatePlaylist("testP1");

tempPlaylist = myTunes.CreatePlaylistInSource("testP2",myTunes.LibrarySource); 

public void ShowTree(Node T)
        {
            if (T != null)
            {
                Console.Write(T.DATA+ "\n");
                ShowTree(T.LEFT);
                ShowTree(T.RIGHT);
            }
            
        }

private static void ShowTree(Node tp, int spaces)
        {
            int i = 0;

            if (tp != null)
            {
                ShowTree(tp.left, spaces + 3);

                for (i = 0; i < spaces; i++)
                {
                    Console.Write(" ");
                }

                Console.WriteLine(tp.data);
                ShowTree(tp.right, spaces + 3);
            }
        }

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace AplikacioniStudentet
{
    public partial class FormaStudentet : Form
    {
        public FormaStudentet()
        {
            InitializeComponent();
           
        }

        private void Form1_Load(object sender, EventArgs e)
      
        {

        }

        private void textBoxID_TextChanged(object sender, EventArgs e)
        {
            string pathi = "Studentet.txt";
            using (FileStream fs = new FileStream(pathi, FileMode.Create))
            {
                using (StreamWriter sw = new StreamWriter(fs))
                {
                    foreach (string line in textBoxID.Lines)
                        sw.Write(line + sw.NewLine);
                    sw.Close();
                }
            }
            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string pathi = "Studentet.txt";
            using (FileStream fs = new FileStream(pathi, FileMode.Create))
            {
                using (StreamWriter sw = new StreamWriter(fs))
                {
                    sw.WriteLine(textBoxID.Text + " " + textBoxEmri.Text + " " + textBoxMbiemri.Text + " ");
                    sw.Flush();
                    sw.Close();
                }
            }
           
            /*TextWriter tw = new StreamWriter (pathi, true);
            tw.ID = ID;
            tw.emri = emri;
            tw.mbiemri = mbiemri;


            tw.Close();*/
            
        }

        private void textBoxEmri_TextChanged(object sender, EventArgs e)
        {
            string pathi = "Studentet.txt";
            using (FileStream fs = new FileStream(pathi, FileMode.Create))
            {
                using (StreamWriter sw = new StreamWriter(fs))
                {
                    foreach (string line in textBoxEmri.Lines)
                        sw.Write(line + sw.NewLine);
                    sw.Close();
                }
            }
        }

        private void textBoxMbiemri_TextChanged(object sender, EventArgs e)
        {
            string pathi = "Studentet.txt";
            using (FileStream fs = new FileStream(pathi, FileMode.Create))
            {
                using (StreamWriter sw = new StreamWriter(fs))
                {
                    foreach (string line in textBoxMbiemri.Lines)
                        sw.Write(line + sw.NewLine);
                    sw.Close();
                }
            }
        }

        private void listBoxStudentat_SelectedIndexChanged(object sender, EventArgs e)
        {
            ListBox lb = new ListBox();
            System.IO.StreamReader sr = new System.IO.StreamReader("Studentet.txt");

            while (!sr.EndOfStream)
            {
                lb.Items.Add(sr.ReadLine());
            }

            sr.Close();
           
        }
    }
}