public class Log
{
    Create log instance#region Create log instance
    private static Log log;
    public static Log DefaultLog()
    {
        if (log == null)
        {
            log = new Log();
        }
        else
        {
            if (log.LogDate.Date != DateTime.Now.Date)
            {
                log = new Log();
            }
        }
        return log;
    }
    #endregion

    Logger logger;

    public Log()
    {
        LogDate = DateTime.Now;
        SimpleConfigurator.ConfigureForTargetLogging(GetFileTarget());
        logger = LogManager.GetCurrentClassLogger();
    }

    public void Write(Exception ex)
    {
        try
        {
            logger.Info(ex.Message + "\r \n" + ex.StackTrace);
        }
        catch
        {
            
        }
    }

    public void Write(string message)
    {
        try
        {
            logger.Info(message);
        }
        catch
        { 
        
        }
    }

    private string GetLogFile()
    {
        string fileName = "Log_" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
        return Path.Combine(AppDomain.CurrentDomain.BaseDirectory + "log", fileName);
    }

    private FileTarget GetFileTarget()
    {
        FileTarget ft = new FileTarget();
        ft.FileName = GetLogFile();
        ft.Layout = "${longdate} ${message}";
        ft.KeepFileOpen = false;
        ft.Encoding = "iso-8859-2";
        ft.OpenFileCacheTimeout = 10;
        ft.OpenFileCacheSize = 1;
        return ft;
    }

    private DateTime logDate;
    public DateTime LogDate
    {
        get { return logDate; }
        set { logDate = value; }
    }
}