using System;

public class Program

{

    public static void Main()

    {

        int[] a = new int[5] {10, 20, 30, 40, 50};

        // Must be in unsafe code to use interior pointers.

        unsafe

        {

            // Must pin object on heap so that it doesn't move while using interior pointers.

            fixed (int* p = &a[0])

            {

                // p is pinned as well as object, so create another pointer to show incrementing it.

                int* p2 = p;

                Console.WriteLine(*p2);

                // Incrementing p2 bumps the pointer by four bytes due to its type ...

                p2 += 1;

                Console.WriteLine(*p2);

                p2 += 1;

                Console.WriteLine(*p2);

                Console.WriteLine("--------");

                Console.WriteLine(*p);

                // Deferencing p and incrementing changes the value of a[0] ...

                *p += 1;

                Console.WriteLine(*p);

                *p += 1;

                Console.WriteLine(*p);

            }

        }

        Console.WriteLine("--------");

        Console.WriteLine(a[0]);

        Console.ReadLine();

        //Console.WriteLine("Hello World");

    }

}