Array hints

int[] numbers = new int[10];
numbers[0] = 4;
numbers[1] = 55;
...

int[] numbers = { 1, 2, 3, 4};
var result = string.Join(",", numbers);

Console.WriteLine(result);

===================
------ Slow Way
// 1 2 3 4 5 6
var text = Console.ReadLine();

string[] parts = text.Split(' ');

int[] numbers = new int[parts.Length];

for (int = 0; i < parts.Length; i++)
{
	numbers[i] = int.Parse(parts[int]);
}

------- Fast Way
using System.Linq;

// 1 2 3 4 5 6
var numbers = Console.ReadLine()
	.Split(' ')
	.Select(int.Parse)
	.ToArray();

// 1 2 3 4 5 6  7
var text = "1 2 3 4 5 6  7";

var parts = text.Split(
		new char[] { ' ' },
		StringSplitOptions.RemoveEmptyEntries);
	.Select(int.Parse)
	.ToArray();