Summary  
This chapter demonstrates how to convert a specific array reversal method into a generic one by parameterizing the element type so the same code can reverse arrays of any type.

General domain of usage  
Array manipulation

You can clone the base code from the  <a 
href="https://github.com/Codefinity-Java/GenericMethodsTask"
target="_blank"
style="color: #ff8a00; font-weight: 600; text-decoration: none; transition: 0.3s ease-in-out;"
onmouseover="this.style.color='#ff0000'"
onmouseout="this.style.color='#d27204'">GithHub Repository</a>.

We have a program which contains a method called `ReverseArray`. The method reversed an integer array. 

In the main method, we are attempting to reverse a string array as well, however, it results in an error because the `ReverseArray` method does not support a `string` array. 

Your task is to convert the `ReverseArray` method into a **generic method** so that the program is able to reverse and display both `example` and `strExample` arrays without any errors. 

**Nothing needs to be modified in the `main` method.** 

**Check:** If the program compiles and runs successfully, reversing and outputting both the `int` and `string` type arrays using the same `reverseArray` method, then your solution is correct.

1. The syntax for converting a method to a generic is <code>methodName&lt;T&gt;(args, …);</code>;<br>
2. Convert the return type of the <code>ReverseArray</code> method into an array of type <code>T</code> (<code>T</code> being the generic type parameter);<br>
3. Convert the argument and the variable type to an array of <code>T</code>. 

Hint

```
namespace ConsoleApp
{
    internal class Program
    {
        public static T[] ReverseArray&lt;T&gt;(T[] array)
        {
            T[] reversedArray = new T[array.Length];
            int lastIndex = array.Length - 1;
            for (int i = 0; i &lt; array.Length; i++)
                reversedArray[i] = array[lastIndex - i];
            return reversedArray;
        }

        static void Main(string[] args)
        {
            int[] example = new int[] { 1, 2, 3, 4, 5 };

            Console.WriteLine("Original Array:");
            foreach(var i in example)
                Console.Write(i + " ");

            Console.WriteLine("");

            example = ReverseArray(example);
            Console.WriteLine("Reversed Array:");
            foreach (var i in example)
                Console.Write(i + " ");

            Console.WriteLine("");

            string[] strExample = new string[] { "a", "b", "c", "d", "e" };
            Console.WriteLine("Original Array:");
            foreach (var i in strExample)
                Console.Write(i + " ");

            Console.WriteLine("");

            strExample = ReverseArray(strExample);
            Console.WriteLine("Reversed Array:");
            foreach (var i in strExample)
                Console.Write(i + " ");
        }
    }
}
```

Solution

In this course, we will learn about some advanced C# concepts along with MAUI, which is an application development library. We will learn how to create some interesting GUI applications while keeping them quick and responsive using techniques like Threading. We will make applications that will interact user input and APIs, and apart from that, we will cover some important C# concepts like Reflection and Generics. This course will further improve our programming skills and will give us a strong foundation to move forward towards Web Development.

In this section, we will learn what MAUI is, and how to set up a .NET MAUI application. We will also look at the structure of an MAUI application, and in the end, we will learn how to add some basic elements to our UI. This section will prepare us for the rest of the course where we will be working with more practical concepts.

In this section we will learn about delegates, events and data binding. Using this knowledge we will learn how to make interesting interactive GUI applications.

In this section, we will learn what Threading is and how to use it to keep our applications responsive, and run smoothly while performing resource intensive tasks. We will see how to differs from other similar concepts on C# and what are good practices when implementing Threading in our application. There will also be some interesting tasks to help us in understand this concept on a deeper level.

In this section, we will learn how to make more robust methods, classes and other objects which can work multiple types of input data types, by first learning about Generics and how to implement generic classes, then we will move on to Reflection and how to use reflection for further improving the capabilities of our programs.

Challenge: Implementing a Generic Method