1using System;
 2using System.Diagnostics;
 3using System.IO;
 4
 5namespace WindowCapture.Helpers
 6{
 7    public static class Logger
 8    {
 9        private static readonly object logLock = new object();
10
11        public static void Log(string category, string message)
12        {
13            Debug.WriteLine(category + ": " + message);
14            try
15            {
16                string dir = Path.Combine(
17                    Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
18                    "WindowCapture");
19                string logPath = Path.Combine(dir, category.ToLowerInvariant() + "_log.txt");
20                // Serialize writes: concurrent File.AppendAllText from the hook thread + worker
21                // threads previously threw sharing-violation IOExceptions and silently dropped lines.
22                lock (logLock)
23                {
24                    if (!Directory.Exists(dir)) Directory.CreateDirectory(dir);
25                    File.AppendAllText(logPath, DateTime.Now.ToString("HH:mm:ss") + " " + message + "\r\n");
26                }
27            }
28            catch { }
29        }
30    }
31}