Use StringBuilder to reverse a string

   
 

using System;
using System.Text;

class MainClass {
    public static string ReverseString(string str)
    {
       if (str == null || str.Length <= 1) 
       {
            return str;
       }

       StringBuilder revStr = new StringBuilder(str.Length);


       for (int count = str.Length - 1; count > -1; count--)
       {
           revStr.Append(str[count]);
       }

       return revStr.ToString();
   }
    public static void Main() {
        Console.WriteLine(ReverseString("The quick brown fox jumped over the lazy dog."));
    }
}