Using custom object arrays

[twinbeeuk]

I use the latest .NET framework. I've hunted high and low for a full solution to this. Coming from a C/C++ background, the below should print out "50" twice, but unfortunately, the second 'Dog' one crashes.

One 'solution' seems to involve 'further instantiation' by using the code: d[10] = new dog(); just before d[10].n=50, but then sounds painful because then if I want access to all 1000 elements, I'll need to use a For loop to instantiate each one individually. Also that wouldn't explain why int gets away with it, but dog doesn't.

Any thoughts? The error encountered is: "NullReferenceException was unhandled".

(On a vaguely related note, can I allocate structs on the heap?)

using System;
class dog { public int n; }

class Program
{
	static void CreateInt() {
		int[] d = new int[1000];
		d[10] = 50; Console.WriteLine(d[10]);
	}
	static void CreateDog() {
		dog[] d = new dog[1000];
		d[10].n = 50;
		Console.WriteLine(d[10].n);
	}
	static void Main(string[] args)
	{
		CreateInt();
		CreateDog();
		Console.ReadLine();
	}
}