Sometimes a bit of information isn’t known by an author at the time of writing, so the book will contain placeholder text to remind everyone to add the information later. Normally, the process works great and the replacement is made without problem. I was recently informed of a problem in Microsoft ADO.NET Entity Framework Step by Step. It turns out that there is placeholder text in some places that reads, “Provide URL Here.” I added the placeholder because I didn’t know where the publisher would store the book’s source code at the time of writing. Of course, the placeholder is hardly helpful to anyone who really would like to find the book’s source.
If you encounter such a placeholder in this book, please go to the O’Reilly download site at http://aka.ms/ADONETEFSbS/files or http://examples.oreilly.com/9780735664166-files/ to obtain the files. I really do consider it important that you download the book’s source code and use it as you work through the text. This particular book has a lot of complex examples that will be tough to get right if you type them in by hand. A single typo can make the examples completely unusable, or at least cause damage to your sample database.
In addition to reading about potential problems and obtaining useful bits of additional information by reading my blog, make sure you also check the book’s errata page at http://www.oreilly.com/catalog/errata.csp?isbn=0790145339164 (see my Errors in Writing post as well). This page provides you with succinct summaries of potential problems and the fixes I suggest for them. Always feel free to write me about my books as well at John@JohnMuellerBooks.com. It’s important to me that you always have a great experience when using my books.