String to Unicode (Exercise)

using System;
using System.Text;
using System.Text.RegularExpressions;

namespace ConsoleTests
{
    class ConsoleTests
    {
        static void Main()
        {
            string input = Console.ReadLine();
            StringBuilder result = new StringBuilder();
            foreach (var character in input)
            {
                int temp = Convert.ToInt32(character);

                    result.Append(String.Format("\\u{0:x4} ", temp).Trim());
            }
            Console.WriteLine(result);
        }
    }
}