I'd like to first of all thank my girlfriend, Sandra Saenz Gonzalez, for her enormous support in taking on the project that this book was. I am greatly thankful for her constant understanding while having me closed up between four walls as I wrote and developed its contents. Thanks, Sandra, I love you.

Big thanks as well to my friend Jesus Salillas, who helped me with style reviews and guidance.

There are many good people out there who I have to thank, too. Thanks to Alfonso Rodriguez, who encouraged me to get into this "big .NET community world," and to Cristina Gonzalez, who has been my MVP Lead for—wow!—6 years already; easier said than done. Additionally, there is my good friend Paco Marin, who encouraged me strongly to write for him and his magazine, DotNetMania, now DNM, and during these years of collaboration, while writing for him, we have become good friends; thank you for all your support and care.

On the way, I found great friends out there, versed in the community, who allowed me to jump right at my passion. Thanks to the INETA guys, Damir Tomicic, Tomislav Bronzin, Sander Gerz, Andrej Radinjer, Andre Obelink, Christian Nagel, Dobrisa Adamec, and, of course, Miguel Lopez. Thank you for being there and doing what you do, greatly empowering the European developers' community. And for letting me take part in it and letting me "live it." One simple word—outstanding.

I'd like to give a big thank you to the staff of Packt Publishing for this opportunity, their support and patience on bringing this together, and for their understanding concerning my move to Switzerland, which had me a bit lost for a while (regarding the book). There you showcased that you are truly valuable, as a company and as people; special thanks to Rashmi Phadnis, Amey Sawant, and Dayan Hyames.

And finally I would like to thank Layla Driscoll, former Product Manager of the .NET CLR team, and Leon Welicki, Program Manager of the Workflow Foundation, both of whom I have had the honor of having as technical reviewers for this book. Thanks! It's awesome to count on you as reviewers.

I also have some friends who believed in me and encouraged me to write and said "I could do it"—thanks Braulio Diez, David Nudelman, Luis Franco, David Salgado, and Luis Fraile for your friendship, belief, and support.

I wouldn't have been able to write enclosed in the 15 square meters—my home for almost four months of my initial stay in Switzerland—if I couldn't take my stress out, which I did with my friends at Crossfit Zurich, so I want to give a big thank you to Ozi, all the coaches, and friends I have found at the "box" for being there!

And I will end by thanking those who started it all for me, that is, thanks to my father and mother for giving me birth and making me so curious; love you.

Thank you all!