void Log(string s, object o = null)
{
if (s.StartsWith(Resources.Error, StringComparison.CurrentCulture))
{
Memo.SelectionColor = Color.Red;
}
if (o != null)
{
s = ((o as Downloader).Tag as ListViewItem).Name + ' ' + s + "\r\n";
}
Memo.SelectionStart = Memo.TextLength;
Memo.AppendText(s);
Memo.SelectionLength = s.Length;
Memo.ScrollToCaret();
}
