This print for content only-size & color not accurate 7" X 9-1/4" / casebound / malloy

// The hidden int backing field is set to zero!

public int NumberOfCars { get; set; }

// The hidden Car backing field is set to null!

public Car MyAuto { get; set; }

}

Given C#’s default values for field data, you would be able to print out the value of

NumberOfCars as is (as it is automatically assigned the value of zero), but if you directly invoke

MyAuto, you will receive a null reference exception:

static void Main(string[] args)

{

...

Garage g = new Garage();

// OK, prints defualt value of zero.

Console.WriteLine("Number of Cars: {0}", g.NumberOfCars);

// Runtime error! Backing field is currently null!

Console.WriteLine(g.MyAuto.PetName);

Console.ReadLine();

}

Given that the private backing fields are created at compile time, you will be unable to make

use of C# field initialization syntax to allocate the reference type directly with the new keyword.

Therefore, this work will need to be done with type constructors to ensure the object comes to life

in a safe manner. For example:

class Garage

{

// The hidden backing field is set to zero!

public int NumberOfCars { get; set; }

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8849CH13.qxd  10/2/07  12:42 PM  Page 423

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// The hidden backing field is set to null!

public Car MyAuto { get; set; }