using System;

using System.Linq;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {   

        string input = "Спало коте – ето колапс!";

        string result = Operations.GetResult(input);

        int len = result.Length;

        string second = null;

        Console.WriteLine("Result is: " +result);

        Console.WriteLine("Result len is: " +result.Length);

        string first = result.Substring(0, result.Length/2);

        if (len % 2 == 0)

        {

            second = new string(result.Substring(result.Length/2).Reverse().ToArray()); 

        }

        else

        {

            second = new string(result.Substring(result.Length/2 + 1).Reverse().ToArray()); 

        }

        Console.WriteLine("First is: " +first);

        Console.WriteLine("Second is: " +second);

        bool equal = first.Equals(second);

        Console.WriteLine("First is equal to Second? " +equal);

        if(equal)

        {

            Console.WriteLine($"'{input}' е Палиндром");

        }

        else

        {

            Console.WriteLine($"'{input}' НЕ е Палиндром");

        }

    }   

}

​

public static class Operations

{

    public static string GetResult(string word)

    {

        string removableChars = Regex.Escape(@"“„–@&'()<>#.,;:-=+_!? -");

        string pattern = "[" + removableChars + "]";

        return Regex.Replace(word, pattern, string.Empty).ToLower();  

    }

}