Write a class representing an Apartment with an Address (a string - e.g. "123 main street"), Rent, Size (in square foot rounded off). Make sure these properties have error checking for their set method. Add a default constructor and a constructor that accepts values for each property. Add a ToString method. Add a property that returns the price per square foot. Include a main routine that tests all of your properties by setting a property with an allowable value then get the property and making sure it is the same value