gistfile1.cs

public class CourseTemplate
{
  public int Limit { get; set; }
  public string Description { get; set; }
}

public struct Course
{
  public CourseTemplate Template { get; set; }
  public bool IsMorning { get; set; }
  public RegistrantList Registrants { get; set; }
}

public class Registrant
{
  public CourseList CourseWishes { get; set; }
  public string Name { get; set; }
}