using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<int?> lstInt = new List<int?>();

        for(int i = 0; i < 10; i++)

            if(i == 2)

                lstInt.Add(null);

            else

                lstInt.Add(i);

        Console.WriteLine("Lista Com null");

        foreach(var item in lstInt)

            Console.WriteLine(item);

        lstInt.RemoveAll(x => x == null);

        Console.WriteLine("Lista Sem Null");

        foreach(var item in lstInt)

            Console.WriteLine(item);

        Console.ReadLine(); 

    }

}