public void InterfacesInCollections()
{
//arange
var orange = new Orange();
var fruitSalad = new List <IFruit>
{
new Banana(),
new Grape(),
orange
};
foreach (var fruit in fruitSalad)
{
Console.WriteLine($"{fruit.Name} {fruit.Peel()}");
Assert.IsInstanceOfType(fruit, typeof(IFruit));
}
Console.WriteLine(orange.Squeeze());
}