Mine

using System;

public sealed class NaturalEqualityComparer<T>
{
	public static NaturalEqualityComparer<T> Default {
		get {
			return new NaturalEqualityComparer<T> ();
		}
	}
}

class X
{
	static void Main ()
	{
		object o = NaturalEqualityComparer<object>.Default;
		if (o == null)
			throw new Exception ("FUCK");
	}
}