using System;

using System.Text;

​

public class Program

{

    public static void Main()

    {

            //string hexZahl = Console.ReadLine();

        var hex = "7B5C727466315C616465666C616E67313032355C616E73695C";

        var rtfBytes = FromHex(hex);

        var rtfText = Encoding.ASCII.GetString(rtfBytes);

        Console.WriteLine(rtfText);

    }

    public static byte[] FromHex(string hex)

    {

        var result = new byte[hex.Length / 2];

        for (var i = 0; i < result.Length; i++)

        {

            result[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);

        }

        return result;

    }

}