public static string Get16String(string str)
{
StringBuilder sb = new StringBuilder();
byte[] bytes = System.Text.Encoding.Unicode.GetBytes(str);
for (int i = 0; i < bytes.Length; i += 2)
{
sb.Append("%u");
sb.Append(bytes[i + 1].ToString("X2"));
sb.Append(bytes[i].ToString("X2"));
}
return sb.ToString();
}