C# code for MP3 tag renaming

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

namespace MusicIDv3Renamer
{
    public partial class mainForm : Form
    {
        public mainForm()
        {
            InitializeComponent();
        }

        private void openFiles()
        {
            if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                musicsPathListBox.Items.AddRange(openFileDialog1.FileNames);
            }
        }

        private void addBtn_Click(object sender, EventArgs e)
        {
            openFiles();
        }

        private String getNameFromIDv3Tags(String path)
        {
            try
            {
                TagLib.File mp3 = TagLib.File.Create(path);
                String artist = String.Join(", ", mp3.Tag.Performers);
                artist = toUtf8(artist);

                String name = mp3.Tag.Title;
                name = toUtf8(name);

                return (artist + " - " + name).Trim();
            }
            catch (Exception e)
            {
                return "ERROR [" + e.Message + "]";
            }
        }

        private void rename(String path, String newFileName)
        {
            try
            {
                String directory = Path.GetDirectoryName(path);
                String ext = (path.Split('.')[(path.Split('.').Length - 1)]);
                String newPath = directory + "\\" + newFileName + "." + ext;
                System.IO.File.Move(path, newPath);
            }
            catch (Exception e)
            {
                try
                {
                    logListBox.Items.Add("Не удалось переименовать файл " + Path.GetFileName(path) + " в " + Path.GetFileName(newFileName) + ". [" + e.Message + "]");
                } catch { }
            }
        }

        private void goBtn_Click(object sender, EventArgs e)
        {
            if (musicsPathListBox.Items.Count <= 0)
            {
                MessageBox.Show("Файлы не добавлены :(", "Пустой список", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            goBtn.Enabled = false;
            addBtn.Enabled = false;
            musicsPathListBox.Enabled = false;
            foreach (String mp3 in musicsPathListBox.Items)
            {
                String newSongName = getNameFromIDv3Tags(mp3);
                if (newSongName.StartsWith("ERROR ["))
                {
                    try
                    {
                        logListBox.Items.Add("Не удалось получить теги с файла " + Path.GetFileName(mp3) + ": " + newSongName);
                    }
                    catch { }
                }
                else
                {
                    if (newSongName == "-")
                    {
                        try
                        {
                            logListBox.Items.Add("Файл " + Path.GetFileName(mp3) + " не содержит тегов :( Не переименовываю!");
                        }
                        catch { }
                    }
                    else
                    {
                        rename(mp3, newSongName);
                    }
                }
            }
            musicsPathListBox.Items.Clear();
            goBtn.Enabled = true;
            addBtn.Enabled = true;
            musicsPathListBox.Enabled = true;
            MessageBox.Show("Вся работа закончена :)", "Ура!", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        private String toUtf8(string unknown)
        {
            if (unknown != null)
            {
                return new string(unknown.ToCharArray().Select(x => ((x + 848) >= 'А' && (x + 848) <= 'ё') ? (char)(x + 848) : x).ToArray());
            }
            else
            {
                return "";
            }
        }

        private void clearLogBtn_Click(object sender, EventArgs e)
        {
            logListBox.Items.Clear();
        }

        private void clearMusicList_Click(object sender, EventArgs e)
        {
            musicsPathListBox.Items.Clear();
        }
    }
}