using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace _10.ConvertStringToCharString
{
    class ConvertStringToCharString
    {
        static void Main()
        {

            string str = "Hi!";
            string newString = null;
            for (int i = 0; i < str.Length; i++)
            {
                newString = String.Format("{0}{1}{2}",newString,"\\u",Convert.ToString(((int)str[i]),16).PadLeft(4,'0'));
            }
            Console.WriteLine(newString);
        }
    }
}