private void GrowHair(object item)
{
IHairy emotional = item as IHairy;
if (emotional != null)
{
Console.Write($"{item.GetType().Name}: ");
emotional.GrowHair();
}
}
private void GrowHair(object obj)
{
IHairy hairy = obj as IHairy;
if (hairy != null)
{
Console.WriteLine("{0}", obj.GetType().Name);
hairy.GrowHair();
}
}