Time for action – extending the string class

Let's take a look at extensions in practice by adding a custom method to the String class.

Create a new C# script in the Scripts folder, name it CustomExtensions, and add the following code:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine; 
 
 // 1
 namespace CustomExtensions 
 {
     // 2
     public static class StringExtensions
     {
         // 3
         public static void FancyDebug(this string str) 
         {
             // 4
             Debug.LogFormat("This string contains {0} characters.", 
               str.Length);
         }
     }
 } 

Let's break down the code:

1. First, it declares a namespace named CustomExtensions to hold all the extension classes and methods.
2. Then, it declares a static class named StringExtensions for organizational purposes; each group of class extensions should follow this setup.

3. Next, it adds a static method named FancyDebug to the StringExtensions...