unrar with sharpCompress

if (!SharpCompress.Archive.Rar.RarArchive.IsRarFile(textBox1.Text))
            {
                MessageBox.Show("File is not a rar file");
            }
            else
            {
                try
                {

                    String s = textBox1.Text;
                    String[] fileName = Regex.Split(s, "\\\\");

                    foreach (String chars in fileName)
                    {

                        if(chars.ToLower().Contains(".rar")){
                            s = chars.ToLower().Replace(".rar",null);
                            break;
                        }
                    }

                    using (Stream stream = File.OpenRead(textBox1.Text))
                    {
                        var reader = ReaderFactory.Open(stream);
                        while (reader.MoveToNextEntry())
                        {
                            String sReplaced = reader.Entry.FilePath.Replace(s, null).Replace("\\\\", null);
                            Boolean bEncrypt = reader.Entry.IsEncrypted;
                            String sItem = sReplaced + " Encrypted: " + bEncrypt;

                            if (sReplaced != String.Empty)
                            {
                                listBox1.Items.Add(sItem);
                            }


                            for (int i = 0; i <= (listBox1.Items.Count - 1); i++)
                            {
                                if (listBox1.Items[i].ToString() == String.Empty)
                                {
                                    listBox1.Items.RemoveAt(i);
                                }
                            }
                                reader.WriteEntryToDirectory(textBox2.Text, ExtractOptions.Overwrite);
                        }
                    }
                }catch (Exception EX){
                    MessageBox.Show(EX.Message);
                }


            }