Classes for my blog post on Object Creation.

GoodDojo.cs

	sealed class GoodDojo
	{

		private readonly IList<Student> students;
		public Sensei Sensei { get; }

		public IEnumerable<Student> Students => this.students;

		public GoodDojo(Sensei sensei)
		{
			Sensei = sensei;
			this.students = new List<Student>();
		}

		public GoodDojo(Sensei sensei, IEnumerable<Student> students)
		{
			Sensei = sensei;
			this.students = students.ToList();
		}

		public string Summary => $"this dojo is run by {Sensei.Name} and has {Students.Count()} students";
		
		public void AddNewStudent(Student student) 
		{
			// business logic? validation? checks? 	
			this.students.Add(student);
		}
	}

UsingGoodDojo.cs

	class Program
	{
		static void Main(string[] args)
		{
			var goodDojo = new GoodDojo(new Sensei("Dom"));

			Console.WriteLine(goodDojo.Summary);

			Console.ReadKey();
		}
	}