Saturday, August 3, 2013

Client-Side Reporting with Visual Studio in C#

Client-Side Reporting with Visual Studio in C# shows how to design and create stunning professional reports with SQL Server 2005 and with Visual Studio versions 2005 and 2008.

Saturday, July 13, 2013

Pro C# 5.0 and the .NET 4.5 Framework

This new edition of Pro C# 5.0 and the .NET 4.5 Platform has been completely revised and rewritten to reflect the latest changes to the C# language specification and new advances in the .NET Framework. 

Monday, July 1, 2013

Beginning ASP.NET Security

You may know ASP.NET, but if you don't understand how to secure your applications, you need this book. This vital guide explores the often-overlooked topic of teaching programmers how to design ASP.NET Web applications so as to prevent online thefts and security breaches.

Sunday, June 30, 2013

Head First Mobile Web

Mobile web usage is exploding. Soon, more web browsing will take place on phones and tablets than PCs. Your business needs a mobile strategy, but where do you start? Head First Mobile Web shows how to use the web tech- nology you’re already familiar with to make sites and apps that work on any device of any size. Put your JavaScript, CSS media query, and HTML5 skills to work, and then optimize your site to perform its best in the demanding mobile market. Along the way, you’ll discover how to adapt your business strategy to target specific devices.

SQL Injection Attacks and Defense

"SQL injection is probably the number one problem for any server-side application, and this book is unequaled in its coverage."

Tuesday, June 25, 2013

Office 2013 All-In-One For Dummies

Home and business users around the globe turn to Microsoft Office and its core applications every day. Whether you're a newcomer or a veteran Office user, this friendly-but-informative guide provides in-depth coverage on all the newest updates and enhancements to the Office 2013 suite. With an overview of tools common to all Office applications and self-contained minibooks devoted to each Office application, Office 2013 All-in-One For Dummies gets you up to speed and answers the questions you'll have down the road.

WordPress 24-Hour Trainer

As an open source content management system, WordPress allows users to easily build feature-rich web sites with no programming experience. This unique book-and-video package is a friendly, self-paced beginners guide to the latest release of WordPress. Lessons are focused on practical, everyday tasks that users will need to create and maintain their sites: entering new content, creating new pages, managing menus, making content search-engine friendly. Plus you'll find lots of tips based on years of experience teaching people to use WordPress.

Saturday, June 22, 2013

Pro Android 4

Pro Android 4 shows you how to build real-world and fun mobile apps using the new Android SDK 4 (Ice Cream Sandwich), which unifies Gingerbread for smartphones, Honeycomb for tablets and augments further with Google TV and more. 

Tuesday, June 18, 2013

Sams Teach Yourself Visual Basic 2012 in 24 Hours

In just 24 sessions of one hour or less, you’ll learn how to build  complete, reliable, and modern applications with Visual Basic 2012. Using this book’s straightforward, step-by-step approach, you’ll master the entire process, from navigating VB 2012 to deploying finished solutions. You’ll learn how to write efficient object-oriented code; build superior user interfaces; work with graphics, text, and databases; and even control external applications. Each lesson builds on what you’ve already learned, giving you a strong, practical foundation for success!

Monday, June 10, 2013

Beginning E-Commerce with Visual Basic, ASP, SQL Server 7.0 and MTS

Beginning E-Commerce offers an excellent demonstration of full-featured e-commerce Web-site construction with the Microsoft suite of development tools. If VB is your language of choice and ASP is your Web scripting selection, this tutorial is a must.

Android Tablets For Dummies April 2013

Whether you are one of the millions who already have an Android tablet, or you are interested in joining the masses with a first-time purchase, this friendly guide is perfect for you! Written by the ultimate For Dummies author Dan Gookin, this funny-but-informative book introduces you to the features of all Android tablets and details the nuances of what makes a tablet more than a smartphone yet different than a computer. You'll discover how to browse the web on your tablet, get organized with a digital calendar, enjoy music and books, use the camera, access social networks, watch video, and more.

Sunday, June 9, 2013

Murach's Visual Basic 2010

Whether you're new to Visual Basic or you're upgrading to VB 2010 from an earlier version, this new edition of Murach's core VB book shows you how to develop the kind of bullet-proof Windows Forms applications that businesses rely on. Along the way, you'll learn how to quickly build database applications by using RAD features like data sources and the DataGridView control. You'll learn how to use object-oriented features like inheritance and interfaces as well as 2010 features like auto-implemented properties and collection initializers. You'll learn how to use LINQ to query data and XML to exchange data between applications. You'll learn how to take advantage of all the productivity features of Visual Studio 2010. When you re done, you'll be able to develop Windows Forms applications the way the best professionals develop them. That's why we say: No other book teaches you so much, so fast, or so thoroughly.

Professional Crystal Reports for Visual Studio .NET 2nd Edition

What is this book about?
The addition of Crystal Reports 9.0 to Visual Studio .NET 2003 offers developers a reporting tool that allows you to turn almost any data into interactive, dynamic content through portals, wireless devices, and Microsoft Office documents. This code-intensive guide takes you step by step through developing reports and incorporating them into applications.

Worx Professional.ASP.NET MVC 3


New edition of the top book on MVC from the top ASP.NET experts at Microsoft!

MVC 3 is the latest update to Microsoft's Model-View-Controller technology, which enables developers to build dynamic, data-driven web sites. This in-depth book shows you step by step how to use MVC 3. Written by top ASP.NET MVC experts at Microsoft, the latest edition of this popular book covers new and updated features such as the new View engine, Razor, NuGet, and much more. The book's practical tutorials reinforce concepts and allow you create real-world applications. Topics include controllers and actions, forms and HTML helpers, Ajax, unit testing, and much more.

Saturday, June 8, 2013

Hello Python


Hello! Python fully covers the building blocks of Python programming and gives you a gentle introduction to more advanced topics such as object-oriented programming, functional programming, network programming, and program design. New (or nearly new) programmers will learn most of what they need to know to start using Python immediately.

Thursday, June 6, 2013

HTML5 Canvas Example

To show how to put the Canvas element to work, we’re going to create an example named canvas.html, which you can see running in Firefox in Figure

Tuesday, June 4, 2013

Programming The Mobile Web 2nd Edition

With the second edition of this popular book, you’ll learn how to build HTML5 and CSS3-based apps that access geolocation, accelerometer, multi-touch screens, offline storage, and other features in today’s smartphones, tablets, and feature phones. The market for mobile apps continues to evolve at a breakneck pace, and this book is the most complete reference available for the mobile web.

Essential LINQ

LINQ is one of Microsoft’s most exciting, powerful new development technologies. Essential LINQ is the first LINQ book written by leading members of Microsoft’s LINQ and C# teams. Writing for architects, developers, and development managers, these Microsoft insiders share their intimate understanding of LINQ, revealing new patterns and best practices for getting the most out of it.

Monday, June 3, 2013

Apress Beginning PHP and MySQL 4th

Beginning PHP and MySQL: From Novice to Professional, Fourth Edition is a major update of W. Jason Gilmore's authoritative book on PHP and MySQL. The fourth edition includes complete coverage of PHP 5.3 features, including namespacing, an update of AMP stack installation and configuration, updates to Zend Framework, coverage of MySQL Workbench, and much more.
You'll not only receive extensive introductions to the core features of PHP, MySQL, and related tools, but you'll also learn how to effectively integrate them in order to build robust data-driven applications. Gilmore has seven years of experience working with these technologies, and he has packed this book with practical examples and insight into the real-world challenges faced by developers. Accordingly, you will repeatedly return to this book as both a valuable instructional tool and reference guide.

Saturday, June 1, 2013

HTML5 Drawing with the Canvas Element

The HTML5 Canvas element is a popular one, used to display graphics. The element itself is created very simply in HTML5, like this:
The Canvas element can draw lines, arcs, complex shapes, images, text, and more.

Microsoft SQL Server 2008 All-in-One Desk Reference for Dummies

If you’re in charge of database administration, developing database software, or looking for database solutions for your company, Microsoft SQL Server 2008 All-In-One Desk Reference For Dummies can help you get a handle on this extremely popular relational database management system. Here you’ll find what’s new in the latest version; how to choose and install the right variation for your needs; how to monitor, maintain, and protect your data; and what it takes to keep your database healthy. You’ll discover how to:

Wednesday, May 29, 2013

Professional ASP.NET MVC 2

ASP.NET MVC 2.0 is now available and shipping with Visual Studio 2010 and .NET 4. A new update to Microsoft’s Model-View-Controller technologies, MVC 2 enables developers to build dynamic, data-driven Web sites. Professional ASP.NET MVC 2 shows you step-by-step how to use MVC 2. You’ll learn both the theory behind MVC 2, as well as walk through practical tutorials, where you’ll create a real-world application. Topics include transitioning from ASP.NET development, as well as an overview of related tools and technologies, including LINQ, jQuery, and REST.

SAMS Teach Yourself HTML5 in 10 Minutes (2011)

You don't need to wait to begin using HTML5, the successor to HTML 4 and XHTML . HTML5 is now being implemented in the latest versions of all the major browsers, and with it come some of the most exciting and powerful advances in web development technology in years. 

Sunday, May 26, 2013

.NET Interview Question: Garbage Collection

Q1. What is garbage collection?

Garbage collection is a heap-management strategy where a run-time component takes responsibility for managing the lifetime of the memory used by objects. This concept is not new to .NET - Java and many other languages/runtimes have used garbage collection for some time.

.NET Interview Question: Application Domains

Q1. What is an application domain?

An AppDomain can be thought of as a lightweight process. Multiple AppDomains can exist inside a Win32 process. The primary purpose of the AppDomain is to isolate applications from each other, and so it is particularly useful in hosting scenarios such as ASP.NET. An AppDomain can be destroyed by the host without affecting other AppDomains in the process.

Thursday, May 23, 2013

Interview Question .NET Assemblies

Q1. What is an assembly?

An assembly is sometimes described as a logical .EXE or .DLL, and can be an application (with a main entry point) or a library. An assembly consists of one or more files (dlls, exes, html files etc), and represents a group of resources, type definitions, and implementations of those types. An assembly may also contain references to other assemblies. These resources, types and references are described in a block of data called a manifest. The manifest is part of the assembly, thus making the assembly self-describing.

An important aspect of assemblies is that they are part of the identity of a type. The identity of a type is the assembly that houses it combined with the type name. This means, for example, that if assembly A exports a type called T, and assembly B exports a type called T, the .NET runtime sees these as two completely different types. Furthermore, don't get confused between assemblies and namespaces - namespaces are merely a hierarchical way of organising type names. To the runtime, type names are type names, regardless of whether namespaces are used to organise the names. It's the assembly plus the typename (regardless of whether the type name belongs to a namespace) that uniquely indentifies a type to the runtime.

Assemblies are also important in .NET with respect to security - many of the security restrictions are enforced at the assembly boundary. Finally, assemblies are the unit of versioning in .NET - more on this below.

Wednesday, May 22, 2013

Java Interview Questions and Answers Part 16

Q141. How to make an array copy from System?

There is a method called arraycopy in the System class. You can do it: System.arraycopy(sourceArray, srcOffset, destinationArray, destOffset,
numOfElements2Copy);
When you use this method, the destinationArray will be filled with the elements of sourceArray at the length specified.

Java Interview Questions and Answers Part 15

Q131. What is the relationship between synchronized and volatile keyword?

The JVM is guaranteed to treat reads and writes of data of 32 bits or less as atomic.(Some JVM might treat reads and writes of data of 64 bits or less as atomic in future) For long or double variable, programmers should take care in multi-threading environment. Either put these variables in a synchronized method or block, or declare them volatile.

Tuesday, May 21, 2013

Java Interview Questions and Answers Part 14

Q121. Can you make an instance of an abstract class? For example - java.util.Calender is an abstract class with a method getInstance() which returns an instance of the Calender class.

No! You cannot make an instance of an abstract class. An abstract class has to be subclassed. If you have an abstract class and you want to use a method which has been implemented, you may need to subclass that abstract class, instantiate your subclass and then call that method.

Monday, May 20, 2013

Java Interview Questions and Answers Part 13

Q111. What is a Container in a GUI?

A Container contains and arranges other components (including other containers) through the use of layout managers, which use specific layout policies to determine where components should go as a function of the size of the container.

Sunday, May 19, 2013

Java Interview Questions and Answers Part 12

Q101. What interface must an object implement before it can be written to a stream as an object?

An object must implement the Serializable or Externalizable interface before it can be written to a stream as an object.

Wednesday, May 8, 2013

What Is HTML5 ?


Many people are saying that it’s about time for HTML5 HTML 4.01 was completed in 1999. Others are saying that what HTML5 offers is just too good to pass up. We hope you’ll agree with both opinions.

Tuesday, May 7, 2013

Java Interview Questions and Answers Part 11

Q91. What is casting?

There are two types of casting, casting between primitive numeric types and casting between object references. Casting between numeric types is used to convert larger values, such as double values, to smaller values, such as byte values. Casting between object references is used to refer to an object by a compatible class, interface, or array type reference.

Saturday, April 27, 2013

Java Interview Questions and Answers Part 10

Q81. Which class should you use to obtain design information about an object?

The Class class is used to obtain information about an object's design.

Monday, April 22, 2013

Java Interview Questions and Answers Part 9

Q71. Which package has light weight components?

javax.Swing package. All components in Swing, except JApplet, JDialog, JFrame and JWindow are lightweight components.

Java Interview Questions and Answers Part 8

Q61. What is the purpose of the finally clause of a try-catch-finally statement?

The finally clause is used to provide the capability to execute code no matter whether or not an exception is thrown or caught.

Sunday, April 21, 2013

Java Interview Questions and Answers Part 7

Q51. How does Java handle integer overflows and underflows?

It uses low order bytes of the result that can fit into the size of the type allowed by the operation.

Java Interview Questions and Answers Part 6

Q41.  What are wrapped classes?

Wrapped classes are classes that allow primitive types to be accessed as objects.

Saturday, April 20, 2013

Java Interview Questions and Answers Part 5

Q31. What happens when a thread cannot acquire a lock on an object?

If a thread attempts to execute a synchronized method or synchronized statement and is unable to acquire an object's lock, it enters the waiting state until the lock becomes available.

Thursday, April 18, 2013

Parallelizing a Long Running Service

We will write some simple sample code that will simulate a long running service call.
You are going to use the PayrollServices.GetPayrollDeduction() method which is provided with the begin solution of this article. This is the type of long running code that you would ultimately like to run in parallel.

Saturday, April 13, 2013

Thursday, April 11, 2013

Andoid Apps for Absolute Beginners



Anybody can start building simple apps for the Android platform, and this book will show you how!  Recently updated to include Android Jelly Bean, Android Apps for Absolute Beginners, Second Edition takes you through the process of getting your first Android apps up and running using plain English and practical examples. 

Java Interview Questions and Answers Part 3


Q11. Name the container which uses Border Layout as their default layout?

A container which uses Border Layout as their default are: window, Frame and Dialog classes.

Java Interview Questions and Answers Part 2


Q1. How are Observer and Observable used?

Objects that subclass the Observable class maintain a list of observers. When an Observable object is updated, it invokes the update() method of each of its observers to notify the observers that it has changed state. The Observer interface is implemented by objects that observe Observable objects.

Tuesday, April 9, 2013

Java Interview Questions and Answers Part 1

Q1. What is Collection API ?

The Collection API is a set of classes and interfaces that support operation on collections of objects. These classes and interfaces are more flexible, more powerful, and more regular than the vectors, arrays, and hashtables if effectively replaces. Example of classes: HashSet, HashMap, ArrayList, LinkedList, TreeSet and TreeMap. Example of interfaces: Collection, Set, List and Map.

Monday, April 8, 2013

Creating Discovery Proxy part 1

All the previous posts in WCF have relied on a well known UDP multicast endpoint for discovery. The port and multicast address are specified by the WS-Discovery protocol documentation. The utilization of this multicast discovery is referred to as ad hoc discovery. Ad hoc discovery is limited to recognizing only services on the same subnet. Managed discovery allows you to locate services no matter where they are, as long as they are registered with a discovery proxy.

Sunday, April 7, 2013

Pro WPF and Silverlight MVVM

WPF and Silverlight are unlike any other user interface (UI) technologies. They have been built to a new paradigm that—if harnessed correctly—can yield unprecedented power and performance. This book shows you how to control that power to produce clean, testable, maintainable code.

Saturday, April 6, 2013

ADO.NET 4 Step by Step

Teach yourself the fundamentals of ADO.NET 4 -- one step at a time. With this practical, learn-by-doing tutorial, you get the clear guidance and hands-on examples you need to start creating applications for Windows and Web.

How to Make Money Online with a Membership Site



One of the easiest ways to create a recurring income online is with a membership site. In fact, there’s been a huge increase in the number of membership sites over the past few years. There are sites available for nearly every interest that you can imagine.

How to Make Money Online a Local Online Mall


Another way to make money online while helping small business owners in your hometown or local area is with a local online mall.

Wednesday, April 3, 2013

Pro C# 2010 and the .NET 4 Platform

The first edition of this book was released at the 2001 Tech-Ed conference in Atlanta, Georgia. At that time, the .NET platform was still a beta product, and in many ways, so was this book. This is not to say that the early editions of this text did not have merit—after all, the book was a 2002 Jolt Award finalist and it won the 2003 Referenceware Excellence Award. However, over the years that author Andrew Troelsen spent working with the common language runtime (CLR), he gained a much deeper understanding of the .NET platform and the subtleties of the C# programming language, and he feels that this fifth edition of the book is as close to a “final release” as he’s come yet.

Monday, April 1, 2013

How to Make Money Online as a Virtual Assistant


Do you have experience in the administrative field but don’t want to return to the workplace right now? Maybe you’re a new mother, are a college student, recently retired or recovering from an illness or operation.

Saturday, March 30, 2013

How to Make Money Online with a Content Site


One of the fastest and easiest ways to make money online is with a content site….YOU ALREADY KNOW THAT! What you may not know is how to take this idea to a whole new level. A much more profitable way to create wildly popular content sites is by using breaking news that millions of people are search for TODAY. I’ll also give you 14 other methods to monetize your site. I certainly cannot discredit adsense a good way to monetize content site but I want to give you a few good alternatives.

How to Make Money Online as a Coach/Consultant


The internet is the perfect place to grow your business as a coach or consultant in almost any field. The web gives you an opportunity to display your expertise in a variety of formats including writing, audio clips, or videos. All of these methods give you the opportunity to reach a global audience full of thousands of potential new clients. In return they all get a chance to “try out” your coaching or consultant style and level of expertise before they commit to a long term and possibly expensive contract.

How to Make Money Online with Audio eCourses


In today’s fast paced world one of the things that you have to consider when creating a products is how will your  customer actually use the product. In many cases, yourcustomer may like to download audio products to a computer or ipod to be able to listen to the content on the go.

Wednesday, March 27, 2013

How to Make Money Online with Residual Income Programs


Residual Income is another term for “recurring” income. Basically there are three types of income streams that you may have coming into your business. If you do a one-time job, sale or perform a contract, you get paid once and the income stops there. If you do a normal 9 to 5 job, you will continue to get paid as long you continue to work for your employer—often called a linear income. This is the type of income that the majority of workers “enjoy.” Even if you are a neurosurgeon, lawyer or engineer, you are only paid as long as you continue working. You stop working and the bank account dwindles.

How to Make Money Online with Teleseminars & Webinars


Not very long ago only the “big dogs” or major players online were able to conduct their bown teleseminars or webinars. That’s no longer the case and now a teleseminar or webinar is actually one of the most affordable products that you can create.

Tuesday, March 26, 2013

How to Make Money Online Creating Your Own Software


This idea may seem intimidating at first…especially if you’ve never imagined yourself as a software creator. Heck, you might not even feel competent to operate most software…forget about creating it.

How to Make Money Online with a Local Real Estate Portal


One of the most promising ways that I know of to make a lot of money online very quickly is by starting a real estate portal.

How to Make Money Online with a Classified Advertising Site


One way to make a lot of money online in a very short time frame can be with classified advertising. Just ask the owners of sites like Craigslist and their many clones.

Thursday, March 21, 2013

How to Make Money Online Interviewing Experts


Want an idea for making lots of money for less than an hour of work…if you could honestly call it “work”? How about making money talking about topics that you’re already passionate about? How about also getting paid for having conversations with people that you hold in high esteem?

How to Make Money Online Selling Stock Photos


It seems like almost everywhere you look these days someone has a digital camera and is taking pictures non stop. If you’re one of those photo bugs who never gets enough of taking pictures then a good way to turn your passion into profits is by becoming a stock photographer.

Tuesday, March 19, 2013

How to Make Money Online with an Internet Radio Show


It’s a chance to do something that you love for free, help others and possibly make money all at the same time. Does it get any better than that?

How to Make Money Online with Your Own Niche or Local Directory

One of  favorite ways to make money online is with niche or local directories. It’s a great way earn recurring income without much effort.

Monday, March 18, 2013

How to Make Money Online with ebay Referrals


You probably already know at least a little something about making money by selling products on the world’s largest marketplace – ebay. But did you know that you can make money without stocking, selling or shipping any merchandise at all. That’s right. You can become an ebay affiliate and make money just by sending others to their website.

Make Money Online with eBooks


Right now is one of the best times in Internet marketing history to make a ton of money online with ebooks. Even with the popularity of audio and video products ebooks remain a staple of online publishing and they’ll be around forever.

Sunday, March 17, 2013

Make Money Online with Blogs


You can set up a free blog using either wordpress.com or blogger.com.


Whichever of the two platforms that you select is pretty much a matter of personal preference. I happen to like wordpress better because I like the wide range of templates and plugins that are available to make customization a snap. With wordpress it’s also very easy to add affiliate banners and links that immediately pulls in visitors and stirs their interest in whatever I’m advertising.

Whichever of the two platforms that you select is pretty much a matter of personal preference. I happen to like wordpress better because I like the wide range of templates and plugins that are available to make customization a snap. With wordpress it’s also very easy to add affiliate banners and links that immediately pulls in visitors and stirs their interest in whatever I’m advertising.

To save time and effort you can go to SubmitemNow.com. This free software works in your Mozilla Foxfire browser and submits your blog to more than 100 directories all at once.

Take advantage of these free tools that help you get more traffic. The more traffic that you get your blog that more visitors and subscribers you’ll end up with. That translates into more money in your pocket.




Make Money Online with Affiliate Programs


Just in case you've never tried your hand at affiliate marketing here is an easy guide for getting started and a few tips to help you avoid the mistakes that many “newbie” marketers often make.

Sunday, March 10, 2013

ASP.NET Interview Question Part 5


Q41. What are the events that happen when a client requests an ASP.NET page from IIS server?


The following events happen when a client requests an ASP.NET page from the IIS server:

ASP.NET Interview Question Part 4


Q31. Which method is used to force all the validation controls to run?


The Page.Validate() method is used to force all the validation controls to run and to perform validation.

Great Interview Questions Part 1

The most often used interview questions and putting a new spin on their interpretations. These questions have stood the test of time, and we should consequently recognize their value in the candidate assessment process. Their inherent weakness, of course, lies in their overuse. Most of us can remember being asked these very same questions= during our own past interviews. And job-finding books and career magazines abound with suggested responses to help candidates ‘‘steer clear of the interview questioning snare’’ vis-a`-vis these popular queries waiting to trip them up.

Friday, February 8, 2013

Ajax Fundamentals part 2

Web Form Processing

  • Major change in Ajax is in page processing and we have two options:
    • traditional full - page processing
    • AJAX partial - page processing
  • Initially full page comes from the server and then can use either full partial - page processing

Friday, February 1, 2013

CAPTCHA

CAPTCHA

CAPTCHA or Captcha (pronounced as cap-ch-uh) which stands for “Completely Automated Public Turing test to tell Computers and Humans Apart” is a type of challenge-response test to ensure that the response is only generated by humans and not by a computer. In simple words, CAPTCHA is the word verification test that you will come across the end of a sign-up form while signing up for Gmail or Yahoo account. The following image shows the typical samples of CAPTCHA.
What is CAPTCHA and How it Works?

Sunday, January 27, 2013

Ajax Fundamentals part 1

Solution is Ajax

Combines  open standards-base technologies to solve aproblem in web application.
  • Asynchronous client-side call to server
  • Its well JavaScript
  • Data in varios formats
Update portion page without blocking other user action.
  • It is not like ASP.NET caching
Goal is to make browser / server interaction easy and fast .

Saturday, January 12, 2013

Error handling and logging


We don't think any "enterprise application" can truly be called "enterprise" if it doesn't handle errors well and notify someone to address them. In an ASP.NET site, there are basically two forms of errors—errors that you have caught, and the ones you couldn't. Pretty simple, right? Well, not so fast! Whether you have trapped an error or not, the user of your application is still going to end up with some form of disruption in their surfing experience. So we need a way to not only provide users with a smooth disruption but also to fix the disruption so that it doesn't happen again.

Automatic Traffic Exchange

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