static public void LogActivity(string activity) { string nameOfCurrUser = LoginValidation.getCurrUserName(); string activityLine = DateTime.Now + ";" + LoginValidation.getCurrUserName() + ";" + LoginValidation.currentUserRole + ";" + activity; currentSessionActivities.Add(activityLine); if (File.Exists(filePath)) { File.AppendAllText(filePath, activityLine, Encoding.UTF8); } else { Console.WriteLine("Error while working with log file."); } currentSessionActivities.Add(activityLine); }