public int TotalCount()
{
int b = Bicycles != null?Bicycles.Count() : 0;
int a = Accessories != null?Accessories.Count() : 0;
return(a + b);
}
public void RemoveAccessories(Accessories accessories)
{
Accessories.Remove(accessories);
}
public void AddAccessories(Accessories accessories)
{
Accessories.Add(accessories);
}