Introduction

In this blog, I am going to explain the program for string reverse using StringBuilder.
Software Requirements:
  • C# 3.0 or higher,
  • Visual Studio or Notepad
Program
  1. using System;
  2. using System.Text;
  4. namespace StringReverseUsingStringBuilder {
  5. public static class StringReverse {
  6. // Reverse ExtentionMethod
  7. public static string Reverse(this string str) {
  8. // calling StringReverseUsingStringBuilder
  9. return Program.StringReverseUsingStringBuilder(str);
  10. }
  11. }
  12. class Program {
  13. static void Main() {
  14. Console.WriteLine("(Input is Optional and Default value will be CSharpcorner)");
  15. Console.WriteLine("Enter your data to Reverse otherwise just Hit Enter");
  16. string sampleText = Console.ReadLine();
  17. if (string.IsNullOrEmpty(sampleText))
  18. sampleText = "https://www.c-sharpcorner.com";
  19. Console.WriteLine("=======================================================");
  20. Console.WriteLine($ "Original Text : {sampleText}");
  21. Console.WriteLine("=======================================================");
  22. var reverseText = StringReverseUsingStringBuilder(sampleText);
  23. Console.WriteLine($ "Reversed Text (Using Normal Method) : {reverseText}");
  24. Console.WriteLine("======================================================");
  25. reverseText = sampleText.Reverse();
  26. Console.WriteLine($ "Reversed Text (Using Extension Method) : {reverseText}");
  27. }
  28. public static string StringReverseUsingStringBuilder(string str) {
  29. StringBuilder sb = new StringBuilder(str);
  30. for (int i = 0; i < sb.Length / 2; i++) {
  31. var temp = sb[sb.Length - i - 1];
  32. sb[sb.Length - i - 1] = sb[i];
  33. sb[i] = temp;
  34. }
  35. return sb.ToString();
  36. }
  37. }
  38. }
If the user does not enter anything, then the default value will be "https://www.c-sharpcorner.com"
An example with input would be if the user enters "c-sharpcorner
In my next blog, we will discuss generating Random numbers without using Random Class. Thank you so much for reading my blog post.