Example of transferring xml escape characters using ascii code

Today, my colleague said that I would transmit the encrypted 1 piece of character through XML, but XML cannot transmit escape characters. What should I do?

Just use the ASCII code.

// into ASCII code 
            string old = "j\n\f}m\b|\t?gWZMMIVO";
            char[] cs = old.ToArray();
           string temp="";
            foreach(char a in cs)
            {
                temp += ((int)a).ToString() + ",";
            }

            // Change character 
            string newstr="";
            string[] tp = temp.Split(',');            
             foreach(string st in tp)
             { 
                 if(""!=st)
                 newstr += (char)(short.Parse(st));
             }