Get only unique using mask

[Ant6729]

Hello, csharpforumers)!

private void button9_Click(object sender, EventArgs e) //???????? ????? ?????? ?? ?????(????, ????? ?????? ?????? ????? ?????????? ??????)
        {
            searchMask(listBox1);
        }

        void searchMask(ListBox listBox1) // ????? ?????? ?? ?????
        {
            string rootFolder = @"C:\Users\lavraschuk\Desktop\Files";
            string pattern = @"\b(ArtId=[^a-z][^|][^,][^*][0-9]*)\b";
            using (StreamWriter sw = File.CreateText(@"C:\Users\lavraschuk\Desktop\Target\target.txt"))
            {
                foreach (var file in Directory.EnumerateFiles(rootFolder, "*.txt", SearchOption.AllDirectories))
                {
                    using (StreamReader sr = new StreamReader(file, System.Text.Encoding.Default))
                    {
                        string line;
                        while ((line = sr.ReadLine()) != null)
                        {
                            string newstring = line.Substring(0, 8);
                            Match match = Regex.Match(line, pattern, RegexOptions.IgnoreCase);
                            //string SubString = file.Substring(file.Length - 36);
                            var name = Path.GetFileName(file);

                            if (match.Success)
                            {
                                var jk = (name + " " + newstring + " " + match.Value);
                                sw.WriteLine(jk);
                            }
                            else
                                sw.Write("");
                        }
                    }
                }
            }
            MessageBox.Show("File txt is ready");
        }

I try to get unique values from txt in attach

but Imnt succeed

Could you write a correct code to do it?

 

[jmcilhinney]

Please describe the actual issue. Just saying that something doesn't work isn't sufficient. What algorithm are you trying to implement? When you debugged your code, exactly where and how did its behaviour deviate from your expectation?