One To Many Relationships With Models Not Working

Question

So I'm trying to establish a one to many relationship between 2 models. I want to retrieve related "Collection" info for every "Member" in my controller like below:

List<Member> members = await _context.Member.ToListAsync();

My collection model (Many) is:

    public class Collection
    {
        public int CollectionId { get; set; }
        public int? MemberId { get; set; }
        public DateTime? CollectionDate { get; set; }
        public int? CollectionTypeId { get; set; }
        public double? CheckAmount { get; set; }
        public string CheckNumber { get; set; }
        public double? CashAmount { get; set; }
        public string CollectionDetails { get; set; }
        public int? PaymentMethodId { get; set; }
        public Member Member { get; set; }
    }

My Member (One) class is:

    public class Member
    {
        public int MemberId { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string StreetAddress { get; set; }
        public string City { get; set; }
        public string State { get; set; }
        public string Zip { get; set; }
        public string Email { get; set; }
        public DateTime? BirthDate { get; set; }
        public bool? PortalUser { get; set; }
        public bool? Active { get; set; }
        public string ImageName { get; set; }
        public string PhoneNumber { get; set; }
        public int MemberTypeId { get; set; }
        public int OrgId { get; set; }

        public List<Collection> Collection { get; set; }

    }

And my data Context:

    public class DataContext : DbContext
    {
        public DataContext(DbContextOptions options) : base(options)
        {

        }
        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Collection>()
                .HasOne(m => m.Member)
                .WithMany(c => c.Collection)
                .HasForeignKey(m => m.CollectionId);
        }

        public DbSet<Member> Member { get; set; }
        public DbSet<Collection> Collection { get; set; }
    }

But when I tried to get the data like in the controller, "Collection" comes back as null.

Failed a coding test today because of it. Any ideas?