public logging(string appName, string cash_register)
{
string filename = appName + "_" + cash_register + "_" + DateTime.Now.ToString("yyyyMMddHHmmssffff") + ".txt";
fs = new FileStream(filename, FileMode.Append, FileAccess.Write, FileShare.Read);
add_to_log_del zapis = new add_to_log_del(add_to_log_fnc);
zapis.BeginInvoke(null, null);
}
public logging(string prefix)
{
_prefix = prefix;
fs = new FileStream(file_base + "\\log.txt", FileMode.Append, FileAccess.Write, FileShare.Read);
add_to_log_del zapis = new add_to_log_del(add_to_log_fnc);
zapis.BeginInvoke(null, null);
}