Create an object in object

Question

What's the syntax for creating a new object within another object?

 

I'm trying to create the object Application in order to use the ShuffleProbability method as shown below. 

 

 

Petowner.Pets.Add(new Cat
{
    Name = "Rambo",
    IsHungry = new Application ShuffleProbability(), // How to use this?
});