string test = "中华人民共和国";
            StringBuilder sb = new StringBuilder();
            foreach (char c in test)
            {
                sb.Append(string.Format("%u{0:X2}", (short)c));
            }
            Console.WriteLine(sb.ToString());

------解决方案--------------------

要先搞清楚那一段是哪種編碼

------解决方案--------------------

C# code

public string EncodeBase6(string code_type,string code)
{
string encode = "";
byte[] bytes = Encoding.GetEncoding(code_type).GetBytes(code);
try
{
encode = Convert.ToBase6String(bytes);
}
catch
{
encode = code;
}
return encode;
}
//base64的拿去参考一下

------解决方案--------------------

C# code
//解码
string str = "%u591A%u591A%u5173%u7167%u591A%u591A%u5173%u7167";    
Response.Write(Server.UrlDecode(str));//输入结果：多多关照多多关照