Let's say I've the following drawing:


Is it more likely to use an Array or a List?
(The max of Px (p1,p2...) is 10)

If it's possible to do in an Array can you please give me a quick explanation how?

Can you re-post the picture?
I'm afraid to click that link.
Can you attach it to the message instead of posting a link?

I've edit the picture, Thanks!

Thanks!
That would (most likely) be a linked list with some of the elements terminating to null.
...or even a dictionary with Lists as members -- one of which is a linked-list.

I've one more question, is this code able to do the orientation that I've been asked to do?
(I know that this is not the full syntax but lets say that from line 39 forward its in the Main)

using System;
namespace ConsoleApplication1
{
    public class Page
    {
        private string name;
        private Page[] links = new Page[0];
        public Page(string name)
        {
            this.name = name;
        }
        public string GetName()
        {
            return this.name;
        }
        public void AddLink(Page link)
        {
            if (this.links.Length < 10)
            {
                Page[] a = new Page[this.links.Length + 1];
                for (int i = 0; i < this.links.Length; i++)
                {
                    a[i] = this.links[i];
                }
                a[a.Length - 1] = link;
                this.links = a;
            }

        }
        public Page[] GetAllLinks()
        {
            return this.links;
        }

    }

}

page index = new page("Index");
page p1 = new page("p1");
page p2 = new page("p2");
page p3 = new page("p3");
page p4 = new page("p4");
page p5 = new page("p5");
page p6 = new page("p6");
index.AddLink(p1);
p1.AddLink(p4);
index.AddLink(p2);
index.AddLink(p3);
p3.AddLink(p5);
p3.AddLink(p6);
p6.AddLink(index);

It might work, but there's a better way to do that?

...maybe shortening the code with something like

index.AddLink(new page("p1"));

...would be cleaner if you never have to directly access p1 outside of the master page