“\u”Unicode字符转为中文字

public static string GetUnicodeStr(string ust)
{
      Regex r = new Regex(@"(?i)\\[uU]([0-9a-f]{4})");
      return r.Replace(ust, delegate(Match m) { return ((char)Convert.ToInt32(m.Groups[1].Value, 16)).ToString(); });
}