/// <summary>/// 将Unicode编码转换为汉字字符串/// </summary>/// <param name="str">Unicode编码字符串</param>/// <returns>汉字字符串</returns>public static string ToGB2312(string str){    string tempStr = str;    MatchCollection mc = Regex.Matches(str, @"\\u([\w]{2})([\w]{2})", RegexOptions.Compiled | RegexOptions.IgnoreCase);    byte[] bts = new byte[2];    foreach (Match m in mc)    {        bts[0] = (byte)int.Parse(m.Groups[2].Value, NumberStyles.HexNumber);        bts[1] = (byte)int.Parse(m.Groups[1].Value, NumberStyles.HexNumber);        tempStr = tempStr.Replace(m.Value, Encoding.Unicode.GetString(bts));    }    return tempStr;}