C#

namespace test
{
	public class Class1
	{
		public Class1(){}

		private string strStatus = "Active";		
		public string Status
		{
			get { return strStatus; }
			set { strStatus = value;}
		}
		public Class2 Class2 { get; set; }		
	}

	public class Class2
	{
		public Class2(){}

		private string strName = "ABC";
		public string Name
		{
			get { return strName; }
			set { strName = value; }
		}
		public Class3 Class3 { get; set; }
	}

	public class Class3()
	{
		ArrayList Element;
		private int intCount = 0;

		public Class3()
		{
			Element = new ArrayList();
		}
		public int Count
		{
			get { return intCount;}			
		}
		public void Add(Class4 Entry)
		{
			Element.Add(Entry);
			intCount++;
		}
		
		public Class4 this[int index]
		{
			get
			{
				return (Class4)Element[index];
			}
		}
	}

	public class Class4
	{
		public Class4(){}

		private int intSub1;
		private int intSub2;

		public int Sub1
		{
			get {return intSub1;}
			set {intSub1 = value;}
		}
		public int Sub2
		{
			get {return intSub2;}
			set {intSub2 = value;}
		}
	}
}

Class1 objClass1 = new Class1();
Class4 objClass4 = new Class4();
objClass4.Sub1 = 68;
objClass4.Sub2 = 73;
objClass1.Class2.Class3.Add(objClass4);

Class4 objClass4Dup = new Class4();
objClass4Dup.Sub1 = 76;
objClass4Dup.Sub2 = 65;
objClass1.Class2.Class3.Add(objClass4Dup);

System.Xml.Serialization.XmlSerializer x = new XmlSerializer(objClass1 .GetType());
StringWriter sw = new StringWriter();
x.Serialize(sw, objClass1);
string strxml = sw.ToString();
MessageBox.Show(strxml);