Characters in Range

using System;
using System.Threading;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter the first character here: ");
            string first = Console.ReadLine();
            char char1 = first[0];
            Console.Write("Enter the second character here: ");
            string second = Console.ReadLine();
            char char2 = second[0];
            for(int i = char1; i < char2; i++)
            {
                Console.Write((char)i + " ");
            }
        }
    }
}