C# 3.0 Design Patterns Unconfirmed Errata

Errata

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The errata list is a list of errors and their corrections that were found after the product was released.

The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.

Color Key: Serious Technical Mistake Minor Technical Mistake Language or formatting error Typo Question

Version	Location	Description	Submitted By
Printed	Page xvi 2nd paragraph	If you are a programmer who loves your code,... should be: if you are a programmer who loves his code,...	Anonymous
Safari Books Online	2.2.4 Example 2-3	Line 61 reads: subject = new( ); which generates a design-time error. On lines: 63 Console.WriteLine((subject as ProtectionProxy).Authenticate("Secret")); 64 Console.WriteLine((subject as ProtectionProxy).Authenticate When the novice C# reader sees this conversion, with the ambiguous new(), it's unclear that the program will only run without a NullReferenceException if subject = new ProtectionProxy. Could lines 61,63,64 be considered redundant?	webster.net
Printed	Page 4 Aggregation	In the book it is written: "A has a B, and B can outlive A" I think correct is: "A has a B, and A can outlive B"	Anonymous
Printed	Page 18 1st paragraph	ListTags does not exist on the Example 2-2. ListTags --> ListTaggedPhotos	Anonymous
Printed	Page 19 Member variables of class TaggedPhoto	The variable "List <string> tags = new List <string> ();" of the class TaggedPhoto must be declared static.	Anonymous
Printed	Page 19 Member variables of class TaggedPhoto	The variable "List <string> tags = new List <string> ();" of the class TaggedPhoto must be declared static.	Anonymous
Printed	Page 19 variable declaration of TaggedPhoto class	List<string> is not declared static, so every instance of TaggedPhoto could only ever have one tag in the list, eg. ListTaggedPhotos will always only return one item.	Anonymous
PDF	Page 19 Sample code line #56, on the page 9th line.	The line: List<string> tags = new List<string>(); Should be: static List<string> tags = new List<string>(); To support the following output: /* Output TaggedPhotos: Food Yellow TaggedPhotos: Food Yellow Jug */	Joel Enriquez
PDF	Page 23 Figure 2-5. Proxy pattern UML diagram	In order to fulfil the Proxy Pattern, the Subject class must implement the ISubject interface. This hasn't been done in the UML diagram.	Alan Cummings
Printed	Page 24 4th bullet	The 4th bullet item on this page is missing a closing parenthesis.	Anonymous
Printed	Page 33 Check() method	If you are going to make a call to Authenticate() in the method it should be unconditional if password != null, otherwise the logic is not consistent.	Anonymous
Printed	Page 102 UML diagram	Class's name 'Class' should 'Client'	Anonymous
Printed	Page 207 Last method public void Output	I was not familiar with the InvokeRequired property, so I looked it up on MSDN and I noticed somethingthere that might be important to note or add to your book. Basically you should check IsHandleCreate when InvokeRequired is false, otherwise some possible bad things could occur.	Anonymous
Printed	Page 229 Example 10-2	The program, which is presented as a complete program, does not compile using Visual Studio 2008's C# 3.0 compiler. The specific errors I get when I attempt to compile the program are the following: Error 1 The name 'VisitAllLabTest' does not exist in the current context C:Documents and Settings miesenMy DocumentsVisual Studio 2008ProjectsLearningAdventuresVisitorPatternFunVisitor Pattern FunProgram.cs 41 34 Visitor Pattern Fun Error 2 The name 'VisitAllLabTest' does not exist in the current context C:Documents and Settings miesenMy DocumentsVisual Studio 2008ProjectsLearningAdventuresVisitorPatternFunVisitor Pattern FunProgram.cs 42 34 Visitor Pattern Fun I did some research into the problem and it appears that the author of this example did not declare and define the VisitAllLabTest() method.	Anonymous