Reverse words in string, C#

Reverse words in string

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var text = "Hello world!";
            
            var result = text.ReversWords();
            Console.WriteLine(result);
        }
    }
    
    public static class StringExtension{
        public static string Revers(this string text){
            var reversedTextBuilder = new StringBuilder();
            foreach(char ch in text){
                reversedTextBuilder.Insert(0,ch);
            }
            
            return reversedTextBuilder.ToString();
        }
        
        public static string ReversWords(this string text){
            var resultTextBuilder = new StringBuilder();
            var word = new StringBuilder();
            foreach(var ch in text){
                if(Char.IsLetter(ch)){
                    word.Insert(0, ch);
                }else{
                    if(word.ToString().Length > 0){
                        resultTextBuilder.Append(word.ToString());
                        word.Clear();
                    }
                    resultTextBuilder.Append(ch);
                }
            }
            
            resultTextBuilder.Append(word.ToString());

return resultTextBuilder.ToString();
        }
    }
}


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