public ActionResult Export(int id)
{
var songList = queries.GetSongList(id);
var formatString = "%notes%;%publishdate%;%title%;%url%;%pv.original.niconicodouga%;%pv.original.!niconicodouga%;%pv.reprint%";
var tagString = queries.GetTagString(id, formatString);
var enc = new UTF8Encoding(true);
var data = enc.GetPreamble().Concat(enc.GetBytes(tagString)).ToArray();
return(File(data, "text/csv", songList.Name + ".csv"));
}