/****************************************************************************************************
* Test Excercise 4
* Modify the EmydexFarmSystem.ReleaseAllAnimals() so that all animals are released (simply clear the collection )
* Expose an event on the FarmSystem FarmEmpty which is invoked once all the animals are released
* Subscribe to that event in the main to get the expected output
*
* Expected Test 4 Program Output
*
* Exercise 4: Press any key to free all animals
* Cow has entered the farm
* Hen has entered the farm
* Horse has entered the farm
* Sheep has entered the farm
* Cow has left the farm
* Hen has left the farm
* Horse has left the farm
* Sheep has left the farm
* Emydex Farm is now empty
********************************************************************************************************************/
private static void Excercise4()
{
//TODO : Apply OOP concepts and modify the code below to get the required output
Console.WriteLine("Exercise 4: Press any key to free all animals");
Console.ReadKey(true);
var farm = new EmydexFarmSystem();
Cow cow = new Cow();
farm.Enter(cow);
Hen hen = new Hen();
farm.Enter(hen);
Horse horse = new Horse();
farm.Enter(horse);
Sheep sheep = new Sheep();
farm.Enter(sheep);
farm.ReleaseAllAnimals();
Console.ReadKey(true);
}
