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Professional Visual Studio 2008

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In these pages you’ll learn to harness every key feature of Visual Studio The opening section will familiarize you with the IDE structure and layout, various options and settings, and other core aspects of Visual Studio

2008 Then you will examine each of the nine major categories composing the functions of Visual Studio 2008 Every chapter is cross-referenced,

so you can achieve a complete understanding of each feature and how all the elements work together to produce an effective programming environment

Professional Visual Studio Extensibility

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C# 2008 Programmer’s Reference

978-0-470-28581-7C# 2008 Programmers Reference provides a concise and thorough reference on all aspects of the language Each chapter contains detailed code samples that provide a quick and easy way to understand the key concepts covered

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978-0-470-19137-8Updated for NET 3.5 and Visual Studio® 2008, this book is the ultimate guide to C# 2008 and its environment The team of superlative authors explain why the C# language cannot be viewed in isolation, but rather, must be considered in parallel with the NET Framework

Beginning Microsoft Visual C# 2008

978-0-470-19135-4Aimed at novice programmers who wish to learn programming with C# and the NET framework, this book starts with absolute programming basics, then moves into Web and Windows programming, data access (databases and XML), and more advanced technologies

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C# 2008 Programmer’s Reference

Introduction xxv

Part I: C# Fundamentals Chapter 1: The NET Framework 3

Chapter 2: Getting Started with Visual Studio 2008 11

Chapter 3: C# Language Foundations 61

Chapter 4: Classes and Objects 125

Chapter 5: Interfaces 171

Chapter 6: Inheritance 183

Chapter 7: Delegates and Events 213

Chapter 8: Strings and Regular Expressions 241

Chapter 9: Generics 265

Chapter 10: Threading 293

Chapter 11: Files and Streams 321

Chapter 12: Exception Handling 377

Chapter 13: Arrays and Collections 397

Chapter 14: Language Integrated Query (LINQ) 425

Chapter 15: Assemblies and Versioning 467

Part II: Application Development Using C# Chapter 16: Developing Windows Applications 503

Chapter 17: Developing ASP.NET Web Applications 545

Chapter 18: Developing Windows Mobile Applications 573

Chapter 19: Developing Silverlight Applications 617

Chapter 20: Windows Communication Foundation 695

Part III: Appendixes Appendix A: C# Keywords 749

Appendix B: Examining the Net Class Libraries Using the Object Browser 757

Appendix C: Generating Documentation for Your C# Applications 765

Index 781

C# 2008

Programmer’s Reference

Copyright © 2009 by Wiley Publishing, Inc., Indianapolis, Indiana

Published simultaneously in Canada

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are the property of their respective owners Wiley Publishing, Inc is not associated with any product or

vendor mentioned in this book

Wiley also publishes its books in a variety of electronic formats Some content that appears in print may not

be available in electronic books

To my family and wife, Shihua, for their support and love

About the Author

Wei - Meng Lee, Microsoft MVP, is a technologist and founder of Developer Learning Solutions

Microsoft and Apple technologies

Wei - Meng writes extensively for online publications such as DevX.com and the O’Reilly Network and

magazines such as CoDe Magazine and asp.netPRO magazine on topics ranging from NET to Mac OS X

He is also the author of Professional Windows Vista Gadgets Programming (Wrox) and Practical NET 2.0

Networking Projects (Apress)

You can contact Wei - Meng at weimenglee@learn2develop.net

About the Technical Editor

Andrew Moore is a graduate of Purdue University – Calumet in Hammond, Indiana, and has been developing software since 1998 for radar systems, air traffic management, discrete - event simulation, and business communications applications using C, C++, C#, and Java on the Windows, UNIX, and Linux platforms Andrew is the author of Wrox Blox articles titled “ Create Amazing Custom User Interfaces with WPF, C#, and XAML in NET 3.0, ” , “ NET 3.5 CD Audio Player, ” and “ Power Programming with ReSharper ” He is currently a senior software engineer at Interactive Intelligence, Inc in Indianapolis developing Microsoft - based applications for business communications Andrew lives in Indiana with his wife, Barbara, and children, Sophia and Andrew

Acknowledgments

Writing a book is like running a long race — you need stamina, training, and perseverance But these are not the most important factors that ensure you reach the finishing line The most important factor is the motivation that keeps you going, on and on, even though you may be physically exhausted and don ’ t think you can move any farther While this is not the first book I have written, I am always very excited when embarking on a new book project After the excitement comes a lot of hard work — coping with missed deadlines, changing work schedules, writer ’ s block, and so forth

For this book, I am extremely lucky to work with two very important people — my acquisitions editor, Katie Mohr, and development editor, Maryann Steinhart Both Katie and Maryann have been very patient with me when the going gets tough Katie has always egged me on, and offered many suggestions to scope the book to what it is today Maryann has been the studious timekeeper, with a gentle but firm voice telling me to press forward when I missed the deadline Maryann has also painstakingly read and reread every sentence I wrote, and I am always surprised with her attention to detail which has definitely made this book a better one With heart - felt sincerity, I want to say a big thank you to both of them!

I would also like to thank the technical editor, Andrew Moore, for giving me many suggestions for improving the book Writing this book has made me learn a lot of things I never knew Thanks, Andrew! Last but not least, I want to take this opportunity to thank my parents and my wife, Shihua, for their understanding and support when I have had to take time away to work on this book Thanks!

Introduction XXV

xvi

Creating an Instance of a Class (Object Instantiation) 127

Summary 240

System.Collections.ObjectModel 288 Summary 291

Summary 320

Working with Files Using the File and FileInfo Classes 326

Handling Exceptions Using the try-catch Statement 378

Implementing IEnumerable<T> and IEnumerator<T> 410

Implementing Comparison Using IComparer<T> and IComparable<T> 413

Summary 424

Query Syntax versus Method Syntax and Lambda Expressions 429

Making the Shared Assembly Visible in Visual Studio 495

Summary 499

xxii

Building the Directory Tree and Displaying Images 515

AJAX-Enabling a Page Using the ScriptManager Control 563

Displaying Progress Using the UpdateProgress Control 565 Displaying a Modal Dialog Using the ModalPopupExtender Control 566

Summary 572

Summary 616

xxiv

Index 781

The latest version of C# 3.0 comes with NET Framework 3.5 It contains many new features that makes the language more intuitive and powerful Coupled with Visual Studio 2008, Microsoft ’ s flagship development environment, developing applications using C# is now available to a wide audience

In writing this book, I used the approach I believe is the easiest way to learn a new language — by examples Often, books and articles get into too much of the theory without showing the readers what the concept looks like in code For each topic, I try to provide numerous examples to illustrate the concept, and I would encourage you to make changes to the program to explore further If you are an experienced programmer, you can jump directly to a particular chapter, as each chapter comes with independent examples

Who This Book Is For

This book is for programmers of all levels Beginning programmers should find the C# language easy to learn through the many code examples provided in each chapter Experienced programmers can jump directly to individual chapters covering the topics of interest to them

A conscious effort is made to illustrate each topic with independent code examples so that readers who want clarification on a topic do not need to wade through the entire chapter

This book is ideal for the working programmer as well as students taking a semester course in C# programming The sample projects covered in chapters16 to 20 provide numerous project ideas as well as motivation for readers to get started working on bigger projects

What This Book Covers

This book is divided into three parts Part I covers the C# language fundamentals; Part II covers application development using C#, and Part III provides three appendices that cover the list of C# keywords, the NET class libraries, and document generation using the Sandcastle utility

Introduction

xxvi

Part I: C# Fundamentals

Chapter 1 introduces the NET Framework It examines the key components in the NET

Framework as well as the role played by each of the components In addition, it discusses the

relationships between the various versions of the framework, from version 1.0 to the latest 3.5

Chapter 2 covers the use of Microsoft Visual Studio 2008 as the tool for C# development Visual

Studio 2008 is an extremely versatile and powerful environment for developing NET

applications This chapter explores some of the common features that you will likely use in the

process of your development work

Chapter 3 introduces the syntax of the C# language and covers all the important topics:

C# keywords, variables, constants, comments, XML documentation, data types, flow control,

loops, operators, and preprocessor directives

Chapter 4 tackles one of the most important topics in C# programming — classes and objects

Classes are essentially templates in from which you create objects In C# NET programming,

everything you deal with involves classes and objects This chapter provides a firm foundation

in the use and creation of classes for code reuse

Chapter 5 explains how interfaces can be used to define the contract for a class It also discusses

difference between an interface and an abstract class

Chapter 6 looks at how inheritance facilitates code reuse, enabling you to extend the

functionality of code that you have already written This book explains the different types of

inheritance and how to define overloaded methods and operators

Chapter 7 introduces the concept of delegates and events used in object oriented programming,

and discusses what a delegate is and how delegates are used to implement events

Chapter 8 examines strings handling in C# and the various ways to manipulate them For more

complex strings pattern matching, you can use regular expressions This chapter also covers the

various ways to format your strings data

Chapter 9 looks into the basics of generics and how you can use them to enhance efficiency and

type safety in your applications Generics enable developers to define type - safe data structures

without binding to specific fixed data types at design time

Chapter 10 explains how to write multithreaded applications using the Thread class in the NET

Framework It also shows you how to create and synchronize threads as well as how to write

thread - safe Windows applications

Chapter 11 delves into the concepts of files and streams in NET With streams, you can perform

a wide range of tasks, including compressing and decompressing data, serializing and

deserializing data, and encrypting and decrypting data This chapter covers the various ways to

manipulate files and the various stream objects in NET

Chapter 12 deals with exception handling An exception is a situation that occurs when your

program encounters an error that it is not expecting during runtime Understanding how to

handle exceptions makes your program more robust and resilient

Chapter 13 examines arrays and collections It discusses the many collection classes that you can

use to represent groups of data in NET

Chapter 14 introduces a new feature in NET 3.5: Language Integrated Query (LINQ) It covers all the important implementations of LINQ — LINQ to Objects, LINQ to XML, LINQ to Dataset, and LINQ to SQL

Chapter 15 explores the concept of assemblies In NET, the basic unit deployable is called an assembly Assemblies play an important part of the development process where understanding how they work is useful in helping you develop scalable and efficient NET applications

Part II: Application Development Using C#

Chapter 16 demonstrates how you can build a Windows application using the C# language The sample application illustrates how to perform FTP using the classes available in the NET Framework You will also see how to perform printing in a.NET application and how to deploy Windows applications using the ClickOnce technology

Chapter 17 takes you through building an ASP.NET web application in C# You perform data binding using the new LinqDataSource control and see how to AJAX - enable your web pages Chapter 18 illustrates Windows Mobile development using the NET Compact Framework, a subset of the NET Framework It examines the basics of the Windows Mobile development and builds a sample RSS reader application Finally, it shows you how to create a professional setup package for your application so that it can be distributed to your readers for installation

Chapter 19 helps you get started with Silverlight and provides an opportunity for you to get a feel for Silverlight development works It covers Silverlight 1.0 and 2, and contains several examples showing the capabilities of Silverlight, including animation, media, and NET integration

Chapter 20 provides a quick introduction to the new Windows Communication Foundation (WCF) technology and shows how it addresses some of the limitations of today ’ s web services technology While most books and conferences focus heavily on the theory behind WCF, this chapter shows you how to build WCF services and then explains the theory behind them It ends with an example that creates a ticketing application, allowing multiple clients to obtain updated seat information in real time

Part III: Appendixes

Appendix A lists the various keywords in C# that are predefined and have special meanings to the compiler

Appendix B summarizes the features of the various versions of the NET Framework and explains how to use the Object Browser feature in Visual Studio 2008 to browse the available namespaces and classes in the NET Framework

Appendix C shows you how to generate MSDN - style documentation for your project using Visual Studio 2008 and a third - party documentation generation tool — Sandcastle

Introduction

xxviii

What You Need to Use This Book

For all the examples demonstrated in this book, I used Microsoft Visual Studio Team System 2008

However, Microsoft has released a plethora of editions of Visual Studio designed for the different types

of C# developers:

Visual Web Developer 2008 Express Edition

Visual C# 2008 Express Edition

Visual Studio 2008 Standard Edition

Visual Studio 2008 Professional Edition

Visual Studio 2008 Team System 2008 Architecture Edition

Visual Studio 2008 Team System 2008 Database Edition

Visual Studio 2008 Team System 2008 Development Edition

Visual Studio 2008 Team System 2008 Test Edition

Visual Studio 2008 Team System 2008 Team Suite

For a detailed discussion of the features available in each edition, check out the following URL:

Express editions are designed for hobbyists and are available for download at no charge This is a great

way to get started with Visual Studio 2008 and is ideal for students and beginning programmers

However, if you are a professional developer, you should purchase either the Standard or Professional

Edition If you are developing Windows Mobile applications, you need the Professional Edition (or

higher) If you are working in a large development environment and need to develop collaboratively

with other developers on large projects, check out the Team System editions

If you are not ready to purchase Visual Studio 2008, you can always download a 90 - day trial edition of

Visual Studio 2008 Professional from http://msdn.microsoft.com/en - us/vs2008/

Depending on the edition of Visual Studio you are using, some of the steps illustrated in this book may

not appear exactly the same on your screen However, the differences are minor, and you should not

have any problem in following the steps outlines in each chapter

In addition, readers using Windows Vista should launch Visual Studio 2008 (as well as the Command

Prompt window) in Administrator mode To do so:

Click on Vista Start button

Locate the program you want to launch (Visual Studio 2008, or Command Prompt)

Right - click on the program and select Run as Administrator

Introduction Conventions

A number of conventions are used throughout the book to help you get the most from the text and keep track of what ’ s happening

Boxes like this one hold important, not-to-be forgotten information that is directly relevant to the surrounding text.

Tips, hints, tricks, and asides to the current discussion are offset and placed in italics like this

As for styles in the text:

New terms and important words are highlighted introduced

Keyboard strokes look like this: Ctrl+A

Filenames, URLs, and code within the text looks like this: persistence.properties Code is presented in two different ways:

Code examples nearly always look like this

Gray highlighting is used to show where new code is added to existing code,

Source Code

As you work through the examples in this book, you may choose either to type in all the code manually

or to use the source code files that accompany the book All of the source code used in this book is available for download at www.wrox.com Once at the site, simply locate the book ’ s title (either by using the Search box or by using one of the title lists), and click the Download Code link on the book ’ s detail page to obtain all the source code for the book

Because many books have similar titles, you may find it easiest to search by ISBN; this book ’ s ISBN is

978 - 0 - 470 - 28581 - 7

Once you download the code, just decompress it with your favorite compression tool Alternatively, you can go to the main Wrox code download page at www.wrox.com/dynamic/books/download.aspx to see the code available for this book and all other Wrox books

Errata

Every effort is made to ensure that there are no errors in the text or in the code However, no one is perfect, and mistakes do occur If you find an error such as a spelling mistake or faulty piece of code in one of our books, we would be grateful for your feedback By sending in errata, you may save another

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❑

Introduction

xxx

reader hours of frustration, and at the same time you will be helping us provide even higher - quality

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view all errata that has been submitted for this book and posted by Wrox editors A complete book list

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Part I

C# Fundamentals

Chapter 1: The NET Framework Chapter 2: Getting Started with Visual Studio 2008 Chapter 3: C# Language Foundations

Chapter 4: Classes and Objects Chapter 5: Interfaces

Chapter 6: Inheritance Chapter 7: Delegates and Events Chapter 8: Strings and Regular Expressions Chapter 9: Generics

Chapter 10: Threading Chapter 11: Files and Streams Chapter 12: Exception Handling Chapter 13: Arrays and Collections Chapter 14: Language Integrated Query (LINQ) Chapter 15: Assemblies and Versioning

The NET Framewor k

The NET Framework is a development framework created by Microsoft to enable developers

to build applications that run on Microsoft (and other) platforms Understanding the basics

of the NET Framework is essential because a large part of C# development revolves around using the classes in that framework

This chapter explains the key components in the NET Framework as well as the role played by each of the components In addition, it examines the relationships among the various versions of the Framework, from version 1.0 to the latest 3.5

What ’ s the NET Framewor k?

The NET Framework has two components:

Common Language Runtime .NET Framework class library The Common Language Runtime (CLR) is the agent that manages your NET applications at execution time It provides core services such as memory, thread, and resource management

Applications that run on top of the CLR are known as managed code ; all others are known as

unmanaged code

The NET Framework class library is a comprehensive set of reusable classes that provides all the functionalities your application needs This library enables you to develop applications ranging from desktop Windows applications to ASP.NET web applications, and Windows Mobile applications that run on Pocket PCs

Common Language Runtime

The Common Language Runtime (CLR) is the virtual machine in the NET Framework It sits

on top of the Windows operating system (Windows XP, Windows Vista, Windows Server 2008, and so on) A NET application is compiled into a bytecode format known as MSIL

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Part I: C# Fundamentals

4

(Microsoft Intermediate Language) During execution, the CLR JIT ( just - in - time) compiles the bytecode

into the processor ’ s native code and executes the application Alternatively, MSIL code can be

precompiled into native code so that JIT compiling is no longer needed; that speeds up the execution

time of your application

The CLR also provides the following services:

Memory management/garbage collection

Thread management

Exception handling

Security

NET developers write applications using a NET language such as C#, VB.NET, or C++ The MSIL

bytecode allows NET applications to be portable (at least theoretically) to other platforms because the

application is compiled to native code only during runtime

Windows OS

UnmanagedCode (native apps)

Managed Code

Figure 1-1

Figure 1 - 1 shows the relationships between the CLR, unmanaged and managed code

At the time of writing, Microsoft ’ s implementation of the NET Framework runs only

on Windows operating systems However, there is an open - source implementation of

the NET Framework, called “ Mono, ” that runs on Mac and Linux

NET Framework Class Library

The NET Framework class library contains classes that allow you to develop the following types of

Chapter 1: The NET Framework

ASP.NET Web applications Web Services

Windows Communication Foundation (WCF) applications Windows Presentation Foundation (WPF) applications Windows Workflow Foundation (WF) applications The library ’ s classes are organized using a hierarchy of namespaces For example, all the classes for performing I/O operations are located in the System.IO namespace, and classes that manipulate regular expressions are located in the System.Text.RegularExpressions namespace

The NET Framework class library is divided into two parts:

* Framework Class Library (FCL)

* Base Class Library (BCL) The BCL is a subset of the entire class library and contains the set of classes that provide core functionalities for your applications Some of the classes in the BCL are contained in the mscorlib.dll ,

.NET Framework It encapsulates all the common functions such as file handling, database access, graphics manipulation, and XML document manipulation

The FCL is the entire class library and it provides the classes for you to develop all the different types of applications listed previously

Figure 1 - 2 shows the key components that make up the NET Framework

Windows Forms Web Forms WCF WPF

Figure 1-2

Part I: C# Fundamentals

6

Assemblies and the Microsoft Intermediate

Language ( MSIL )

In NET, an application compiled into MSIL bytecode is stored in an assembly The assembly is contained

in one or more PE (portable executable) files and may end with an EXE or DLL extension

Some of the information contained in an assembly includes:

Manifest — Information about the assembly, such as identification, name, version, and so on

Versioning — The version number of an assembly

Metadata — Information that describes the types and methods of the assembly .

Assemblies are discussed in more detail in Chapter 15

To get a better idea of a MSIL file and its content, take a look at the following example, which has two

console applications — one written in C# and the other written in VB.NET

The following C# code displays the “ Hello, World ” string in the console window:

Chapter 1: The NET Framework

When both programs are compiled, the assembly for each program has an exe extension To view the content of each assembly, you can use the ildasm (MSIL Disassembler) tool

Launch the ildasm tool from the Visual Studio 2008 Command Prompt window (Start Programs Microsoft Visual Studio 2008 Visual Studio Tools Visual Studio 2008 Command Prompt)

The following command uses the ildasm tool to view the assemblies for the C# and VB.NET programs:

Figure 1 - 3 shows the content of the C# and VB.NET assemblies, respectively

Figure 1-3

The Main method of the C# MSIL looks like this:

.method private hidebysig static void Main(string[] args) cil managed{

entrypoint // Code size 19 (0x13) maxstack 8

IL_0000: nop IL_0001: ldstr “Hello, World!”

IL_0006: call void [mscorlib]System.Console::WriteLine(string) IL_000b: nop

IL_000c: call string [mscorlib]System.Console::ReadLine() IL_0011: pop

IL_0012: ret} // end of method Program::Main

Part I: C# Fundamentals

8

The Main method of the VB.NET MSIL looks very similar to that of the C# program:

.method public static void Main() cil managed

IL_0001: ldstr “Hello, World!”

IL_0006: call void [mscorlib]System.Console::WriteLine(string)

} // end of method Module1::Main

The important thing to note here is that regardless of the language you use to develop your NET

applications, all NET applications are compiled to the MSIL bytecode as this example shows This

means that you can mix and match languages in a NET project — you can write a component in C# and

use VB.NET to derive from it

Versions of the NET Framewor k and

V isual Studio

Microsoft officially released the NET Framework in January 2002 Since then, the NET Framework

has gone through a few iterations, and at the time of writing it stands at version 3.5 While technically

you can write NET applications using a text editor and a compiler, it is always easier to write NET

applications using Visual Studio, the integrated development environment from Microsoft With Visual

Studio, you can use its built - in debugger and support for IntelliSense to effectively and efficiently build

.NET applications The latest version of Visual Studio is Visual Studio 2008

The following table shows the various versions of the NET Framework, their release dates, and the

versions of Visual Studio that contain them

Version Version Number Release Date

Versions of Visual Studio shipped

1.0 1.0.3705.0 2002 - 01 - 05 Visual Studio NET 2002

1.1 1.1.4322.573 2003 - 04 - 01 Visual Studio NET 2003