Using uninititalized array C#

I am using Visual Studio, .NET 8.0.

There is my code:

using System;
using System.Globalization;

namespace Learn
{
    class Program
    {
        public static void Main(string[] args)
        {
           int c;
           int[] arr;
           c = int.Parse(Console.ReadLine());

           for (int i = 0; i <= c - 1; i++)
           {
               arr[i] = int.Parse(Console.ReadLine()); 
           }
       }
   };
}

I tried to input this:

3
1
1
1

I get an error CS0165

How to fix that?

>Solution :

you can use List instead of array