Replace char in a StringBuilder object

  
using System;
using System.Collections.Generic;
using System.Text;

class Program {
    static void Main(string[] args) {
        StringBuilder greetingBuilder = new StringBuilder("www.java2s.com");

        for (int i = (int)'z'; i >= (int)'a'; i--) {
            char old1 = (char)i;
            char new1 = (char)(i + 1);
            greetingBuilder = greetingBuilder.Replace(old1, new1);
        }

        for (int i = (int)'Z'; i >= (int)'A'; i--) {
            char old1 = (char)i;
            char new1 = (char)(i + 1);
            greetingBuilder = greetingBuilder.Replace(old1, new1);
        }

        Console.WriteLine("Encoded:\n" + greetingBuilder.ToString());
    }
}

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Replace char in a StringBuilder object : StringBuilder « Development Class « C# / C Sharp

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