❔ Is it a problem to be creating lots of empty lists etc just to avoid null checks?

public class MyLists
{
    public List<ThingOne> ListOne { get; set; } = new List<ThingOne>();

    public List<ThingTwo> ListTwo { get; set; } = new List<ThingTwo>();

    public List<ThingThree> ListThree { get; set; } = new List<ThingThree>();

    public List<ThingFour> ListFour { get; set; } = new List<ThingFour>();

    public List<ThingFive> ListFive { get; set; } = new List<ThingFive>();
}

for(int i = 0; i < 1000000; i++){
    
    MyLists lists = LoadListData(i) ?? new MyLists();

    //If no listdata, make a new MyLists so don't have to null check all the time
    //MyLists also defaults each list to a new List to avoid null checks

    //Is it a problem to be creating thousands of empty lists just to avoid null checks? Is there a better way?


    //do some linq on lists
    lists.ListOne.Where(...)
    lists.ListTwo.FirstOrDefault(...)
    lists.ListThree.Select(...)
    //etc etc
}

public class MyLists
{
    public List<ThingOne> ListOne { get; set; } = new List<ThingOne>();

    public List<ThingTwo> ListTwo { get; set; } = new List<ThingTwo>();

    public List<ThingThree> ListThree { get; set; } = new List<ThingThree>();

    public List<ThingFour> ListFour { get; set; } = new List<ThingFour>();

    public List<ThingFive> ListFive { get; set; } = new List<ThingFive>();
}

for(int i = 0; i < 1000000; i++){
    
    MyLists lists = LoadListData(i) ?? new MyLists();

    //If no listdata, make a new MyLists so don't have to null check all the time
    //MyLists also defaults each list to a new List to avoid null checks

    //Is it a problem to be creating thousands of empty lists just to avoid null checks? Is there a better way?


    //do some linq on lists
    lists.ListOne.Where(...)
    lists.ListTwo.FirstOrDefault(...)
    lists.ListThree.Select(...)
    //etc etc
}