public static IEnumerable <Sportbike> CreateBike()
{
while (true)
{
var b = new Sportbike(GetRandom.GetManuf(), GetRandom.GetModel() + " " + (rand.Next(7, 13) * 100 - 10), rand.Next(1, 99999), rand.Next(5, 20) * 1000);
yield return(b);
}
}