// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002639/array-foreach

​

// @nuget: Z.ExtensionMethods

​

using System;

​

public class Program

{

    public static void Main()

    {

        int[] intArray = new int[] { 2, 3, 4 };

​

        Action<int> action = new Action<int>(ShowSquares);

​

        // C# Extension Method: Array - ForEach

        intArray.ForEach(action);

    }

​

    private static void ShowSquares(int val)

    {

        Console.WriteLine("{0:d}^2 = {1:d}", val, val * val);

    }

}