SYS-CON MEDIA Authors: Elizabeth White, Liz McMillan, William Schmarzo, Dana Gardner, Kevin Benedict

Related Topics: Microsoft Cloud

Microsoft Cloud: Article

Book Review: LINQ in Action

Explains what LINQ does and why

This is a great book on LINQ from some people who not only know LINQ, but also understand LINQ. Many current LINQ books are based on preview versions of LINQ, but authors Fabrice Marquerie, Steve Eichert, and Jim Wooley thought it worth waiting for the final released version before publishing their book. There were some significant changes in the syntax of a few significant commands, so where code in some other books may need minor changes to run, the code in this book is all ready to go.

Part I: Introduction to LINQ
Chapter 1 discusses what it is, what it does, and why we need it. It includes the goals and motivations of LINQ, and the fact that Microsoft has been working on LINQ for several years. This brings us to chapter 2 - VB.NET and C# language enhancements to support LINQ. Starting with C# 2.0, Microsoft has added quite a few enhancements to the .NET languages, especially C# and VB.NET. Some of these enhancements were like generics that were left out of version 1.0 only because of time-to-market constraints, and were needed on their own. Others, like the var type in C# 3.0, left people going "Huh?!" It wasn't a true var type as in VB or Java that could hold different types, because its type is fixed by the compiler during compilation, and it made code harder to read and maintain because the reader would have stop and try to figure out what type the var really was. It turns out that there are cases in LINQ where the compiler needs to infer the variable type from the data source, and var comes to the rescue.

Chapter 2 covers all of the new LINQ-related language features in C# 2.0 and C# 3.0 (VB.NET 8 and VB.NET 9), and explains why they are needed for LINQ and how they are used by LINQ code; note that this book only covers new features related to LINQ (implicitly typed local variables, object and collection initializes, anonymous types, extension methods, anonymous methods, and lambda expressions), and not the full set of features introduced in C# and VB.NET since version 1.1.

Chapter 3 continues where chapter 2 left off by describing how LINQ expands .NET, including sequences and iterators, deferred query execution, query operators and expressions, and expression trees. Chapter 3 also lists the C# and VB.NET syntax used to access the standard query operators.

More Stories By Dennis Hayes

Dennis Hayes is a programmer at Georgia Tech in Atlanta Georgia where he writes software for the Adult Cognition Lab in the Psychology Department. He has been involved with the Mono project for over six years, and has been writing the Monkey Business column for over five years.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Latest Stories
Whenever a new technology hits the high points of hype, everyone starts talking about it like it will solve all their business problems. Blockchain is one of those technologies. According to Gartner's latest report on the hype cycle of emerging technologies, blockchain has just passed the peak of their hype cycle curve. If you read the news articles about it, one would think it has taken over the technology world. No disruptive technology is without its challenges and potential impediments t...
There's no doubt that blockchain technology is a powerful tool for the enterprise, but bringing it mainstream has not been without challenges. As VP of Technology at 8base, Andrei is working to make developing a blockchain application accessible to anyone. With better tools, entrepreneurs and developers can work together to quickly and effectively launch applications that integrate smart contracts and blockchain technology. This will ultimately accelerate blockchain adoption on a global scale.
DXWorldEXPO LLC announced today that Nutanix has been named "Platinum Sponsor" of CloudEXPO | DevOpsSUMMIT | DXWorldEXPO New York, which will take place November 12-13, 2018 in New York City. Nutanix makes infrastructure invisible, elevating IT to focus on the applications and services that power their business. The Nutanix Enterprise Cloud Platform blends web-scale engineering and consumer-grade design to natively converge server, storage, virtualization and networking into a resilient, softwar...
In his session at 21st Cloud Expo, Michael Burley, a Senior Business Development Executive in IT Services at NetApp, described how NetApp designed a three-year program of work to migrate 25PB of a major telco's enterprise data to a new STaaS platform, and then secured a long-term contract to manage and operate the platform. This significant program blended the best of NetApp’s solutions and services capabilities to enable this telco’s successful adoption of private cloud storage and launching o...
Despite being the market leader, we recognized the need to transform and reinvent our business at Dynatrace, before someone else disrupted the market. Over the course of three years, we changed everything - our technology, our culture and our brand image. In this session we'll discuss how we navigated through our own innovator's dilemma, and share takeaways from our experience that you can apply to your own organization.
Founded in 2002 and headquartered in Chicago, Nexum® takes a comprehensive approach to security. Nexum approaches business with one simple statement: “Do what’s right for the customer and success will follow.” Nexum helps you mitigate risks, protect your data, increase business continuity and meet your unique business objectives by: Detecting and preventing network threats, intrusions and disruptions Equipping you with the information, tools, training and resources you need to effectively m...
The Transparent Cloud-computing Consortium (T-Cloud) is a neutral organization for researching new computing models and business opportunities in IoT era. In his session, Ikuo Nakagawa, Co-Founder and Board Member at Transparent Cloud Computing Consortium, will introduce the big change toward the "connected-economy" in the digital age. He'll introduce and describe some leading-edge business cases from his original points of view, and discuss models & strategies in the connected-economy. Nowad...
Having been in the web hosting industry since 2002, dhosting has gained a great deal of experience while working on a wide range of projects. This experience has enabled the company to develop our amazing new product, which they are now excited to present! Among dHosting's greatest achievements, they can include the development of their own hosting panel, the building of their fully redundant server system, and the creation of dhHosting's unique product, Dynamic Edge.
Intel is an American multinational corporation and technology company headquartered in Santa Clara, California, in the Silicon Valley. It is the world's second largest and second highest valued semiconductor chip maker based on revenue after being overtaken by Samsung, and is the inventor of the x86 series of microprocessors, the processors found in most personal computers (PCs). Intel supplies processors for computer system manufacturers such as Apple, Lenovo, HP, and Dell. Intel also manufactu...
Doug was appointed CEO of Big Switch in 2013 to lead the company on its mission to provide modern cloud and data center networking solutions capable of disrupting the stronghold by legacy vendors. Under his guidance, Big Switch has experienced 30+% average QoQ growth for the last 16 quarters; more than quadrupled headcount; successfully shifted to a software-only and subscription-based recurring revenue model; solidified key partnerships with Accton/Edgecore, Dell EMC, HPE, Nutanix, RedHat and V...
PCCW Global is a leading telecommunications provider, offering the latest voice and data solutions to multi-national enterprises and communication service providers. Our truly global coverage combined with local, on the ground knowledge has helped us build best in class connections across the globe; and especially in some of the remotest, hard-to-reach areas in exciting growth markets across Asia, Africa, Latin America and the Middle East.
NanoVMs is the only production ready unikernel infrastructure solution on the market today. Unikernels prevent server intrusions by isolating applications to one virtual machine with no users, no shells and no way to run other programs on them. Unikernels run faster and are lighter than even docker containers.
All in Mobile is a mobile app agency that helps enterprise companies and next generation startups build the future of digital. We offer mobile development and design for smartphones, tablets and wearables. Our projects cover the latest and most innovative technologies - voice assistants, AI, AR/VR and more. We excel at solutions for sports, fintech and retail industries.
Public clouds dominate IT conversations but the next phase of cloud evolutions are "multi" hybrid cloud environments. The winners in the cloud services industry will be those organizations that understand how to leverage these technologies as complete service solutions for specific customer verticals. In turn, both business and IT actors throughout the enterprise will need to increase their engagement with multi-cloud deployments today while planning a technology strategy that will constitute a ...
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO Silicon Valley 2019 will cover all of these tools, with the most comprehensive program and with 222 rockstar speakers throughout our industry presenting 22 Keynotes and General Sessions, 250 Breakout Sessions along 10 Tracks, as well as our signature Power Panels. Our Expo Floor will bring together the leading global 200 companies throughout the world of Cloud Computing, DevOps, IoT, Smart Cities, FinTech, Digital Transformation, and all they entail. As ...