Welcome!

Microsoft Cloud Authors: Kevin Benedict, Pat Romanski, Liz McMillan, Lori MacVittie, Elizabeth White

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.


IoT & Smart Cities Stories
The challenges of aggregating data from consumer-oriented devices, such as wearable technologies and smart thermostats, are fairly well-understood. However, there are a new set of challenges for IoT devices that generate megabytes or gigabytes of data per second. Certainly, the infrastructure will have to change, as those volumes of data will likely overwhelm the available bandwidth for aggregating the data into a central repository. Ochandarena discusses a whole new way to think about your next...
DXWorldEXPO LLC announced today that Big Data Federation to Exhibit at the 22nd International CloudEXPO, colocated with DevOpsSUMMIT and DXWorldEXPO, November 12-13, 2018 in New York City. Big Data Federation, Inc. develops and applies artificial intelligence to predict financial and economic events that matter. The company uncovers patterns and precise drivers of performance and outcomes with the aid of machine-learning algorithms, big data, and fundamental analysis. Their products are deployed...
Dynatrace is an application performance management software company with products for the information technology departments and digital business owners of medium and large businesses. Building the Future of Monitoring with Artificial Intelligence. Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more busine...
All in Mobile is a place where we continually maximize their impact by fostering understanding, empathy, insights, creativity and joy. They believe that a truly useful and desirable mobile app doesn't need the brightest idea or the most advanced technology. A great product begins with understanding people. It's easy to think that customers will love your app, but can you justify it? They make sure your final app is something that users truly want and need. The only way to do this is by ...
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
Digital Transformation and Disruption, Amazon Style - What You Can Learn. Chris Kocher is a co-founder of Grey Heron, a management and strategic marketing consulting firm. He has 25+ years in both strategic and hands-on operating experience helping executives and investors build revenues and shareholder value. He has consulted with over 130 companies on innovating with new business models, product strategies and monetization. Chris has held management positions at HP and Symantec in addition to ...
Cell networks have the advantage of long-range communications, reaching an estimated 90% of the world. But cell networks such as 2G, 3G and LTE consume lots of power and were designed for connecting people. They are not optimized for low- or battery-powered devices or for IoT applications with infrequently transmitted data. Cell IoT modules that support narrow-band IoT and 4G cell networks will enable cell connectivity, device management, and app enablement for low-power wide-area network IoT. B...
The hierarchical architecture that distributes "compute" within the network specially at the edge can enable new services by harnessing emerging technologies. But Edge-Compute comes at increased cost that needs to be managed and potentially augmented by creative architecture solutions as there will always a catching-up with the capacity demands. Processing power in smartphones has enhanced YoY and there is increasingly spare compute capacity that can be potentially pooled. Uber has successfully ...
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things'). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing. IoT is not about the devices, its about the data consumed and generated. The devices are tools, mechanisms, conduits. This paper discusses the considerations when dealing with the...