Demo: String Builder

using System;
using System.Text;

namespace DemoStringBuilder
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //създаване на StringBuilder
            StringBuilder builder = new StringBuilder();//[]
            builder.Append("The cat"); //["The cat"]
            Console.WriteLine(builder.Length); //7
            Console.WriteLine(builder.ToString());//"The cat"
            builder.Replace(' ', '+'); //["The+cat"]
            Console.WriteLine(builder.ToString()); //"The+cat"
            Console.WriteLine(builder[0]);//'T'
            Console.WriteLine(builder[builder.Length - 1]); //'t'
            builder.Insert(0, '%'); //"%The+cat"
            Console.WriteLine(builder.ToString()); //"%The+cat"
            builder.Clear();//[]

        }
        static string reverseString(string text)
        {
            //text = "table";
            StringBuilder reversedString = new StringBuilder(); //[]
            //обърнатия текст -> "elbat"

            //от последния към първия символ
            for (int position = text.Length - 1; position >= 0; position--)
            {
                char currentSymbol = text[position];
                reversedString.Append(currentSymbol);
            }

            return reversedString.ToString();
        }
    }
}