string s = "这里放十六进制字符串"; byte[]buff=new byte[s.Length/2]; int index=0; for (int i = 0; i < s.Length; i += 2) { buff[index] = Convert.ToByte(s.Substring(i, 2), 16); ++index; } string result = Encoding.Default.GetString(buff); Console.Write(result);原文：http://www.cnblogs.com/qinweizhi/p/5646365.html