String utilery

StringUtil.cs

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

namespace ConsoleAppDemo
{
    public static class StringUtil
    {
        private const string Space = " ";

        public static string WithoutSpaces(this string value)
        {
            return value.Replace(Space, string.Empty);
        }

        public static string ReverseWordLinq(this string data)
        {
            return new string(data.Select((value, index) => new { value, index })
                                         .OrderByDescending(x => x.index)
                                         .Select(x => x.value)
                                         .ToArray());
        }

        public static string ReverseWord(this string value)
        {
            return new string(value.Reverse().ToArray());
        }

        public static bool IsPalindrome(string originalData)
        {
            var data = originalData.WithoutSpaces();

            var reverseValue = data.ReverseWord();

            return data == reverseValue;
        }

        public static dynamic IsPalindrome(IList<string> originalData)
        {
            return originalData.Select(x => x.WithoutSpaces())
                .Select(x => new
                {
                    original = x,
                    reverse = x.ReverseWord(),
                    IsPalidrome = (x == x.ReverseWord())
                });
        }
        
        public static dynamic WordsCount(string value)
        {
            var result = value.WithoutSpaces().Select(x => new
            {
                Letter = x.ToString().ToUpper(),
                Count = value.Count(p => p == x)
            }).Distinct().OrderByDescending(x => x.Count).ThenBy(x => x.Letter);

            return new { Word = value, Result = result };
        }
    }
}