Properties by reflexion

how can access sub class properties?, I can access Y properties, in this case Name, but not x, another case is the same but instead of single reference of x, with a list of x, in this second case how iterate every object.

	public class X
	{
		public int ID{get;set;}	
		public int Name{get;set;}
	}

	public class y
	{

		public string Name{get;set;}
		public x Reference{get:set;}
	}

	//Second case with a List
	public class y
	{

		public string Name{get;set;}
		public List<x> Reference{get:set;}
	}

	public static void Main()
	{
		y classY = new y();
		y.Name = "some text here";
		y.x.ID = "1";
		y.x.Name ="some text for x here";
	}

	// in another class, pass y
	// so, in this method I only can get 'y' values, but not x
	Hashtable table = new Hashtable();
	public void GetProperties(object p)
	{
	    Type mytype = p.GetType();
	    var properties = mytype.GetProperties(BindingFlags.Public | BindingFlags.Instance);

	    foreach (var property in properties)
	    {
	    	table.Add(property.Name, property.GetValue(p, null));
		}	
	}

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