How to make a array in c#

                                    // String array for my friends ( Example )
string[] myFriends = {"Friend1", "Friend2", "Friend3", "Friend4"};

// Display MyFriend2 at index of ( 1 )
Console.WriteLine(myFriends[1]);

                                    int[] array = new int[]{1, 2, 3, 4, 5};
foreach (string i in array) 
{
  Console.WriteLine(i);
}

//or

for(int i=0; i<array.Length; i++){
	  Console.WriteLine(array[i]);
}

                                    // Define and Initialize
int[] arr = {1, 2, 3};

// Buuuut:
// Initial defining
int[] arr;

// This works
arr = new int[] {1, 2, 3};   

// This will cause an error
// arr = {1, 2, 3}; 

                                    //use this for unity editor:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MyArray : MonoBehaviour
{
//You can make int, float, strings and more
//Note: You need to asign the objects from the unity editor
    public GameObject[] MyObjects;

    void Update()
    {
    //Here we are useing for loop to destroy our objects in the list
        for (int i = 0; i < MyObjects.Length; i++)
        {
            Destroy(MyObjects[i], 3f);//The 3f is how much seconds to wait 
            //before they will be destroyed
        }
    }
}
//Sry for my english its bad

                                    class TestArraysClass
{
    static void Main()
    {
        // Declare a single-dimensional array of 5 integers.
        int[] array1 = new int[5];

        // Declare and set array element values.
        int[] array2 = new int[] { 1, 3, 5, 7, 9 };

        // Alternative syntax.
        int[] array3 = { 1, 2, 3, 4, 5, 6 };

        // Declare a two dimensional array.
        int[,] multiDimensionalArray1 = new int[2, 3];

        // Declare and set array element values.
        int[,] multiDimensionalArray2 = { { 1, 2, 3 }, { 4, 5, 6 } };

        // Declare a jagged array.
        int[][] jaggedArray = new int[6][];

        // Set the values of the first array in the jagged array structure.
        jaggedArray[0] = new int[4] { 1, 2, 3, 4 };
    }
}