Declaring and using single dimensional array in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace ForgetCode
{   
    public class MainClass
    {
        public static void Main()
        {
            
            // Model 1
            int[] myArray1 = new int[5];

            myArray1[0] = 10;
            myArray1[1] = 20;
            myArray1[2] = 30;
            myArray1[3] = 40;
            myArray1[4] = 50;

            foreach (int i in myArray1)
            {
                Console.WriteLine(i);
            }

            // Model 2
           int[] myArray2 = {1,2,3,4,5};

           foreach (int i in myArray2)
           {
               Console.WriteLine(i);
           }
        }
    }
}

10
20
30
40
50
1
2
3
4
5