public class Bullet
{
    public BulletType { get; set; }
}

public class SingleBullet : Bullet
{
}

public class LaserBullet : Bullet
{
}

public class SpreadBullet : Bullet
{
}

public struct BulletPattern
{
    Bullet bullet;

    public BulletPattern (Bullet _bullet)
    {
        bullet = _bullet;
    }

    //Accesors
    public BulletType Type
    {
        get
        {
            return bullet.Type;
        }
    }

    public Bullet Bullet
    {
        get
        {
            return bullet;
        }
    }
}