C# object

Just expanding a bit on Alex's example, you could do this:

public ParentObject
{
   private SubObject foo;

   public SubObject Foo
   {
      get
      {
        return foo;
      }

      set
      {
        foo = value;
      }
   }
}

public SubObject
{
    private string name;

    public string Name
    {
      get
      {
        return name;
      }

      set
      {
        name = value;
      }
    }   
}

// code to set Foo property

ParentObject po = new ParentObject();
SubObject so = new SubObject();
so.Name = "Abhay";
po.Foo = so;

// code to get Foo property

SubObject so2 = po.Foo;
string name = so2.Name;

If you may want to include several SubObjects within ParentObject, then declare the property (and backup field) as being of type SubObject[] or List rather than just SubObject.

I think I understand your question, I apologize if not. However, you can set up your property like this:

public SubObject Foo
{
   get
   {
      return new SubObject();
   }
}

Now, every time you access the Foo property, you have a new instance of the sub object.