public class FaceLog    {        public static void AppendInfoLog(string errMsg)        {            try            {                string Folder = Main.Instance.AppPath + "\\Logs\\";                string fileName = Folder + "Info_" + DateTime.Now.ToString("yyyyMMdd") + ".txt";                if (!System.IO.Directory.Exists(Folder))                    System.IO.Directory.CreateDirectory(Folder);                if (!File.Exists(fileName))                    System.IO.File.Create(fileName);                using (TextWriter fs = new StreamWriter(fileName, true))                {                    fs.WriteLine("--------------------------" + DateTime.Now.ToString() + "----------------------------------------");                    fs.WriteLine(errMsg);                    fs.WriteLine("");                    fs.WriteLine("");                    fs.Close();                    fs.Dispose();                }            }            catch            {            }        }        public static void AppendErrorLog(string errMsg)        {            try            {                string Folder = Main.Instance.AppPath + "\\Logs\\";                string fileName = Folder + "Error_" + DateTime.Now.ToString("yyyyMMdd") + ".txt";                if (!System.IO.Directory.Exists(Folder))                    System.IO.Directory.CreateDirectory(Folder);                if (!File.Exists(fileName))                    System.IO.File.Create(fileName);                using (TextWriter fs = new StreamWriter(fileName, true))                {                    fs.WriteLine("--------------------------" + DateTime.Now.ToString() + "----------------------------------------");                    fs.WriteLine(errMsg);                    fs.WriteLine("");                    fs.WriteLine("");                    fs.Close();                    fs.Dispose();                }            }            catch            {            }        }    }