Student.cs

public partial class Student
{
    public Student()
    {
        Enrollments = new HashSet<Enrollment>();
    }

    public int StudentId { get; set; }
    public string? LastName { get; set; }
    public string? FirstName { get; set; }
    public DateTime? EnrollmentDate { get; set; }

    public virtual ICollection<Enrollment> Enrollments { get; set; }
}