MainForm.cs

namespace VRCLogParser
{
    using System.Diagnostics;
    using System.IO;
    using System.Linq;
    using System.Text.RegularExpressions;
    using System.Windows.Forms;
    using static System.ComponentModel.Design.ObjectSelectorEditor;
    using static System.Net.Mime.MediaTypeNames;

    public partial class MainForm : Form
    {
        private string vrchat_locallow_path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "AppData", "LocalLow", "VRChat", "VRChat");

        public MainForm()
        {
            InitializeComponent();

            //System.Diagnostics.Debug.WriteLine($"{path}");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Debug.WriteLine("Running...");

            listBox1.Items.Clear();

            DirectoryInfo directory_info = new DirectoryInfo(vrchat_locallow_path);

            FileInfo[] files = directory_info.GetFiles("*.txt").OrderByDescending(p => p.CreationTime).ToArray();

            foreach (FileInfo file in files)
            {
                parse_file(file);
            }
        }

        public string[] WriteSafeReadAllLines(String path)
        {
            using (var filestream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
            using (var streamreader = new StreamReader(filestream))
            {
                List<string> file = new List<string>();
                while (!streamreader.EndOfStream)
                {
                    file.Add(streamreader.ReadLine());
                }

                return file.ToArray();
            }
        }

        private void parse_file(FileInfo file)
        {
            System.Diagnostics.Debug.WriteLine($"Parsing {file.Name}...");

            string[] lines = WriteSafeReadAllLines(file.FullName);

            lines = lines.Reverse().ToArray();

            foreach (string line in lines.Where(l => l.Contains(textBox1.Text)))
                listBox1.Items.Add(line);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string txt = listBox1.GetItemText(listBox1.SelectedItem);

            foreach (Match item in Regex.Matches(txt, @"((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?)"))
            {
                System.Diagnostics.Debug.WriteLine($"{item.Value}");
                //MessageBox.Show(item.Value);

                Clipboard.SetText(item.Value);
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Process.Start("explorer.exe", vrchat_locallow_path);
        }
    }
}