编码问题

http://os.51cto.com/art/201503/467929.htm

http://www.cnblogs.com/skynet/archive/2011/05/03/2035105.html

var source = txt1.Text;
//尊敬的客户，您预定的{SDate}，{StartCity}{ST}-{EndCity}{ET}的{Carrier}{FlightNo}出票成功，{STime}起飞，{ATime}到达。旅客{PsgInfo}，建议提前两小时到达机场办理值机，祝您旅途愉快！

Regex regex = new Regex("\{(.)*\}", RegexOptions.IgnoreCase);
var newSource = regex.Replace(source, "MM");