StringDecryption-ConvertToChar

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

namespace StringDecryption
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] mn = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int[] array = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

            List<int> filtered = new List<int>();
            for (int i = 0; i < array.Length; i++)
            {

                if (array[i] >= 65 && array[i] <= 90)
                {
                    filtered.Add(array[i]);
                }
            }
            int skip = mn[0];
            int take = mn[1];

            List<int> secondFilter = filtered.Skip(skip).Take(take).ToList();

    //        Console.WriteLine($"Filtered: {string.Join(" ", filtered)}");
    //        Console.WriteLine($"Second: {string.Join(" ", secondFilter)}");

            foreach (var chars in secondFilter)
            {
                Console.Write(Convert.ToChar(chars));
            }

        }
    }
}