using System;

public class Program

{

    public static void Main()

    {

        var valueToFill = 165;

        var data = new int[100];

​

        data.AsSpan().Fill(valueToFill);

​

        // print array content

        for (int i = 0; i < data.Length; i++)

        {

            Console.WriteLine(data[i]);

        }

    }

}