C# | Performing Specified action on each element of Array

// C# program to demonstrate
// Array.ForEach(T[], Action<T>)
// Method
using System;
using System.Collections.Generic;

class GFG {

    // Main Method
    public static void Main()
    {

        try {

            // Creating and initializing
            // new Array of int
            int[] myArr = { 2, 3, 4, 5 };

            // Display the values of the myArr.
            Console.Write("Initial Array: ");

            // calling the PrintIndexAndValues()
            // method to print
            PrintIndexAndValues(myArr);

            // set a delegate for
            // the SetSquares method
            Action<int> action = new Action<int>(SetSquares);

            // performing the action
            // using ForEach() method
            Array.ForEach(myArr, action);
        }
        catch (ArgumentNullException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }

    // Defining the method
    // PrintIndexAndValues
    public static void PrintIndexAndValues(int[] myArr)
    {
        for (int i = 0; i < myArr.Length; i++) {

            Console.Write("{0} ", myArr[i]);
        }
        Console.WriteLine();
        Console.WriteLine();
    }

    // Defining the method
    // ShowSquares
    private static void SetSquares(int val)
    {
        Console.WriteLine("{0} squared = {1}",
                              val, val * val);
    }
}

// C# program to demonstrate
// Array.ForEach(T[], Action<T>)
// Method
using System;
using System.Collections.Generic;

public class GFG {

    // Main Method
    public static void Main()
    {

        try {

            // Creating and initializing 
            // new Array of with null
            int[] myArr = null;

            // set a delegate for
            // the Set Squares method
            Action<int> action = new Action<int>(SetSquares);

            // performing the action
            // using ForEach() method
            Console.WriteLine("Trying to perform "
                       +"action on a null Array");
            Console.WriteLine();
            Array.ForEach(myArr, action);
        }
        catch (ArgumentNullException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }

    // Defining the method
    // PrintIndexAndValues
    public static void PrintIndexAndValues(int[] myArr)
    {
        for (int i = 0; i < myArr.Length; i++) {

            Console.Write("{0} ", myArr[i]);
        }
        Console.WriteLine();
        Console.WriteLine();
    }

    // Defining the method
    // ShowSquares
    private static void SetSquares(int val)
    {
        Console.WriteLine("{0} squared = {1}", val, val * val);
    }
}