C#中改变字体的代码

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


namespace test1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("BookSystem");
            Console.Write("BOOK>");
           
            string inputmessage;
            ConsoleColor original;
            original = Console.ForegroundColor;
            do
            {
                
                Console.ForegroundColor = ConsoleColor.Red;
                inputmessage = Console.ReadLine();
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.Write("BOOK>");
                Console.WriteLine(inputmessage);
            } while (inputmessage != "0000");

            Console.ReadKey();
        }
    }
}