C# 5.0 Programmer's Reference

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23 ADO.NET What’s in This Chapter ➤➤ ➤➤ ➤➤ ➤➤ ➤➤ Connecting to databases Bound controls DataGridView, DataGrid, and detail interfaces DataSets ADO.NET Wrox.com Downloads for This Chapter Please note that all the code examples for this chapter are available as a part of this chapter’s code download on the book’s website at www.wrox.com/go/csharp5programmersref on the Download Code tab. Databases play an important role in many software applications. A large percentage of business applications use databases to store, arrange, and otherwise manipulate data. Because databases play such an important role in so many programs, companies such as Microsoft have spent a huge amount of time building database tools. As a consequence, there are several methods you can use to work with databases. Some of the most recent methods include the Entity Framework and LINQ to ADO.NET, which includes LINQ to SQL, LINQ to Entities, and LINQ to DataSet. Those techniques were covered briefly in Chapter 8, “LINQ.” This chapter provides a brief introduction to ADO.NET, a set of classes that provide more direct access to the underlying database. It also shows how you can use bound database components and controls to quickly build simple applications that let you create, edit, and delete database records. www.it-ebooks.info
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www.it-ebooks.info
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C# 5.0 PROGRAMMER’S REFERENCE Int
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Appendix V XML. ...................
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C# 5.0 Programmer’s Reference www
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C# 5.0 Programmer’s Reference Rod
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About the Author Rod Stephens start
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Credits Executive Editor Robert Ell
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Acknowledgments Thanks to Bob Ellio
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CONtents Introduction xxxiii PARt I
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CONTENTS Properties 86 Enumerations
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CONTENTS Set Methods 182 Limiting R
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CONTENTS Hiding and Overriding Even
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CONTENTS Resource Files 405 Applica
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CONTENTS Tasks 496 Threads 498 Coor
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CONTENTS Chapter 3 627 Chapter 4 62
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CONTENTS Appendix i: Error Handling
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CONTENTS Appendix s: Filesystem Cla
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Introduction When it comes to progr
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INTRODUCTION This book focuses on t
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INTRODUCTION Part V: Advanced Topic
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INTRODUCTION Source Code As you wor
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INTRODUCTION After you join, you ca
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Part I The C# Ecosystem ▶▶Chapt
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1The C# Environment What’s in Thi
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The C# Compiler ❘ 5 Consider the
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The CLR ❘ 7 C# Program Visual Bas
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Summary ❘ 9 By using all of these
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2Writing a First Program What’s i
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Types of Projects ❘ 13 TIP For a
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Console Applications ❘ 15 Another
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Windows Forms Applications ❘ 17 T
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WPF Applications ❘ 19 If you skip
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Windows Store Applications ❘ 21 A
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Summary ❘ 23 } // Place the frame
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Exercises ❘ 25 6. Repeat Exercise
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3Program and Code File Structure Wh
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Hidden Files ❘ 29 Figure 3-2: A p
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Preprocessor Directives ❘ 31 The
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Code File Structure ❘ 37 { ... }
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Code File Structure ❘ 39 Unnecess
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Code File Structure ❘ 41 } namesp
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Comments ❘ 43 Comments Comments c
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Comments ❘ 45 XML Comments A norm
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Comments ❘ 47 WindowsFormsApplica
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Exercises ❘ 49 4. Open Project
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Part II C# Language Elements ▶▶
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4Data Types, Variables, and Constan
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Data Types ❘ 55 C# also groups by
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Data Types ❘ 57 Alignment Attribu
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Variable Declaration Syntax ❘ 59
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Initialization ❘ 65 } public Car(
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Initialization ❘ 67 Now the progr
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Literal Type Characters ❘ 69 NOTE
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Literal Type Characters ❘ 71 C# a
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Data Type Conversion ❘ 73 The fol
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Data Type Conversion ❘ 75 You can
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Data Type Conversion ❘ 77 This is
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Scope ❘ 79 ToString The ToString
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Scope ❘ 81 Class Scope A variable
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Parameter Declarations ❘ 83 Becau
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Parameter Declarations ❘ 85 Becau
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Properties ❘ 87 Properties also e
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Enumerations ❘ 89 The syntax for
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Enumerations ❘ 91 The following c
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Delegates ❘ 93 To determine wheth
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Summary ❘ 95 For a more interesti
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Exercises ❘ 97 14. Make two metho
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5Operators What’s in This Chapter
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Arithmetic Operators ❘ 101 The +
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Logical Operators ❘ 103 operator
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Bitwise Operators ❘ 105 Because &
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Assignment Operators ❘ 107 Format
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Operator Precedence ❘ 109 Operato
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DateTime and TimeSpan Operations
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Operator Overloading ❘ 113 The fo
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Operator Overloading ❘ 115 curren
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Summary ❘ 117 In this case it may
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Exercises ❘ 119 11. Before each o
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6Methods What’s in This Chapter
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Method Declarations ❘ 123 See the
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Method Declarations ❘ 125 Now sup
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Method Declarations ❘ 127 } Stree
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Method Declarations ❘ 129 If the
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Method Declarations ❘ 131 The fol
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Method Declarations ❘ 133 "RodSte
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Extension Methods ❘ 135 Explicit
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Lambda Expressions ❘ 137 takes no
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Variance ❘ 139 Variance Suppose t
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Asynchronous Methods ❘ 141 This m
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Asynchronous Methods ❘ 143 Next,
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Asynchronous Methods ❘ 145 callba
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Exercises ❘ 147 The chapters so f
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Exercises ❘ 149 The File menu has
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7Program Control Statements What’
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Decision Statements ❘ 153 If it
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Decision Statements ❘ 155 } break
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Looping Statements ❘ 157 To catch
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Looping Statements ❘ 159 Out of C
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Looping Statements ❘ 161 do Loops
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Looping Statements ❘ 163 One appr
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Looping Statements ❘ 165 break St
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Exercises ❘ 167 else if (person.T
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8LINQ What’s in This Chapter ➤
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Introduction to LINQ ❘ 171 ➤➤
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Basic LINQ Query Syntax ❘ 173 Bas
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Basic LINQ Query Syntax ❘ 175 whe
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Basic LINQ Query Syntax ❘ 177 sel
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Advanced LINQ Query Syntax ❘ 179
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LINQ Extension Methods ❘ 185 Intr
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LINQ Extension Methods ❘ 187 } };
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LINQ to XML ❘ 189 } } // Return t
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LINQ to XML ❘ 191 LINQ into XML L
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LINQ to XML ❘ 193 the code uses t
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LINQ to ADO.NET ❘ 195 more inform
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LINQ to ADO.NET ❘ 197 ID, first a
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PLINQ ❘ 199 download on the book
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Exercises ❘ 201 how you can prote
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Exercises ❘ 203 9. Copy the progr
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9Error Handling What’s in This Ch
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Bugs Versus Undesirable Conditions
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try catch Blocks ❘ 221 catch (exc
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try catch Blocks ❘ 223 When the f
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try catch Blocks ❘ 225 other exce
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try catch Blocks ❘ 227 In that ca
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Exercises ❘ 229 Summary In practi
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10 Tracing and Debugging What’s i
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The Debug Menu ❘ 233 ➤➤ ➤
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The Breakpoints Window ❘ 235 ➤
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The Immediate Window ❘ 237 Right-
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Trace Listeners ❘ 239 Debug.Liste
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Exercises ❘ 241 The chapters in P
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Part III Object-Oriented Programmin
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11 OOP Concepts What’s in This Ch
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Classes ❘ 247 Method AssignJob Pr
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Encapsulation ❘ 249 Private Prope
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Inheritance ❘ 251 For example, su
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Inheritance ❘ 253 you may discove
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Inheritance ❘ 255 The solution is
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Inheritance ❘ 257 Has-a and Is-a
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Inheritance ❘ 259 This method req
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Inheritance ❘ 261 Ann: Person.Hid
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Polymorphism ❘ 263 } } return "Eu
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Polymorphism ❘ 265 version define
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Exercises ❘ 267 Rewrite the code
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12 Classes and Structures What’s
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Classes ❘ 271 For more informatio
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Classes ❘ 273 Extension Tension Y
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Structures ❘ 275 The class automa
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Structures ❘ 277 Heap and Stack P
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Structures ❘ 279 The parameter ad
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Structures ❘ 281 Argument Type Pa
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Constructors ❘ 283 You can overlo
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Structure Instantiation Details ❘
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Garbage Collection ❘ 287 Note tha
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Garbage Collection ❘ 289 ➤➤
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Events ❘ 291 The following list d
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Events ❘ 293 The EventHandler typ
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Events ❘ 295 } MessageBoxButtons.
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Events ❘ 297 The solution is to g
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Static Methods ❘ 299 This kind of
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Exercises ❘ 301 Exercises 1. Draw
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13 Namespaces What’s in This Chap
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The using Directive ❘ 305 The Sys
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The using Directive ❘ 307 Sometim
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The using Directive ❘ 309 Now whe
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Making Namespaces ❘ 311 The Defau
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Resolving Namespaces ❘ 313 Resolv
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Exercises ❘ 315 private ConsoleTy
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14 Collection Classes What’s in T
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Arrays ❘ 319 Array objects can ha
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System.Collections ❘ 321 Property
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System.Collections ❘ 323 Why Both
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System.Collections ❘ 325 The code
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Dictionaries ❘ 327 The System.Col
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Dictionaries ❘ 329 One overloaded
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Stacks and Queues ❘ 331 } } jobsL
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Stacks and Queues ❘ 333 Console.W
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Generic Collections ❘ 335 Notice
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Collection Initializers ❘ 337 Sta
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Summary ❘ 339 } } // If this numb
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Exercises ❘ 341 e. Finally, to pu
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15 Generics What’s in This Chapte
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Defining Generics ❘ 345 Suppose y
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Defining Generics ❘ 347 } public
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Defining Generics ❘ 349 For examp
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Defining Generics ❘ 351 A generic
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Generics and Extension Methods ❘
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Exercises ❘ 355 The chapters in t
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Part IV Interacting with the Enviro
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16 Printing What’s in This Chapte
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Windows Forms Printing ❘ 361 ➤
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Windows Forms Printing ❘ 363 // S
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Windows Forms Printing ❘ 365 The
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Windows Forms Printing ❘ 367 Simi
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Windows Forms Printing ❘ 369 Prop
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Windows Forms Printing ❘ 371 } }
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Windows Forms Printing ❘ 377 Page
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Windows Forms Printing ❘ 379 that
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WPF Printing ❘ 381 Using a Pagina
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WPF Printing ❘ 383 // This exampl
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WPF Printing ❘ 385 } grid.Childre
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WPF Printing ❘ 387 Consectetur
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WPF Printing ❘ 389 To display a F
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Exercises ❘ 391 // Calculate the
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17 Configuration and Resources What
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Environment Variables ❘ 395 To se
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Registry ❘ 397 Method ExpandEnvir
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Registry ❘ 399 Field LocalMachine
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Registry ❘ 401 The following code
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Configuration Files ❘ 403 Figure
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Resource Files ❘ 405 Second, the
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Resource Files ❘ 407 Localization
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Exercises ❘ 409 2. Write a progra
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18 Streams What’s in This Chapter
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Stream ❘ 413 Property Length Posi
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MemoryStream ❘ 415 This code gets
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BinaryReader and BinaryWriter ❘ 4
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StringReader and StringWriter ❘ 4
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StreamReader and StreamWriter ❘ 4
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Summary ❘ 423 Custom Stream Class
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19 File System Objects What’s in
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.NET Framework Classes ❘ 427 Meth
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.NET Framework Classes ❘ 431 Prop
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Using the Recycle Bin ❘ 439 The f
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Using the Recycle Bin ❘ 441 More
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Summary ❘ 443 The code creates a
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20 Networking What’s in This Chap
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Networking Classes ❘ 447 The WebR
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Downloading Information ❘ 449 Dow
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Downloading Information ❘ 451 Fig
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Downloading Information ❘ 453 The
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Uploading Information ❘ 455 Uploa
Page 501 and 502: Getting FTP Information ❘ 457 3.
Page 503 and 504: Sending E‐mail ❘ 459 ➤➤ ➤
Page 505 and 506: Sending Text Messages ❘ 461 For e
Page 507 and 508: Exercises ❘ 463 TERm IP (Internet
Page 509 and 510: Exercises ❘ 465 14. Modify the pr
Page 511 and 512: Part V Advanced Topics ▶▶Chapte
Page 513 and 514: 21 Regular Expressions What’s in
Page 515 and 516: Building Regular Expressions ❘ 47
Page 523 and 524: Using Regular Expressions ❘ 479 M
Page 525 and 526: Using Regular Expressions ❘ 481 }
Page 527 and 528: Exercises ❘ 483 For each match, t
Page 529 and 530: 22 Parallel Programming What’s in
Page 531 and 532: Parallel Programming ❘ 487 Multip
Page 533 and 534: Interacting with the User Interface
Page 535 and 536: BackgroundWorker ❘ 491 The follow
Page 537 and 538: BackgroundWorker ❘ 493 This isn
Page 539 and 540: BackgroundWorker ❘ 495 for (int i
Page 541 and 542: Tasks ❘ 497 Method WaitAny WhenAl
Page 543 and 544: Coordinating Tasks ❘ 499 Creating
Page 545 and 546: Coordinating Tasks ❘ 501 } if (my
Page 547 and 548: Thread-Safe Objects ❘ 503 Other L
Page 549 and 550: Exercises ❘ 505 the BackgroundWor
Page 551: Exercises ❘ 507 The following tex
Page 555 and 556: Using Bound Controls ❘ 511 free.
Page 557 and 558: Using Bound Controls ❘ 513 4. The
Page 559 and 560: Using Bound Controls ❘ 515 If you
Page 561 and 562: Using Bound Controls ❘ 517 Figure
Page 563 and 564: Using Bound Controls ❘ 519 b. In
Page 565 and 566: Using Bound Controls ❘ 521 tools
Page 567 and 568: Using Bound Controls ❘ 523 6. Cre
Page 569 and 570: Loading DataSets ❘ 525 Loading Da
Page 571 and 572: Using ADO.NET ❘ 527 } studentsDat
Page 573 and 574: Using ADO.NET ❘ 529 Executing Com
Page 575 and 576: Exercises ❘ 531 Exercises 1. Writ
Page 577 and 578: 24 XML What’s in This Chapter ➤
Page 579 and 580: Basic XML Syntax ❘ 535 Elements m
Page 581 and 582: Basic XML Syntax ❘ 537 Character
Page 583 and 584: Writing XML Data ❘ 539 Method Wri
Page 585 and 586: Writing XML Data ❘ 541 The follow
Page 587 and 588: Writing XML Data ❘ 543 // Save th
Page 589 and 590: Writing XML Data ❘ 545 The follow
Page 591 and 592: Reading XML Data ❘ 547 XML Litera
Page 593 and 594: Reading XML Data ❘ 549 Method Rea
Page 595 and 596: Related Technologies ❘ 551 The Re
Page 597 and 598: Related Technologies ❘ 553 Operat
Page 599 and 600: Related Technologies ❘ 555 This q
Page 601 and 602: Related Technologies ❘ 557 The bo
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Exercises ❘ 559 Figure 24-5: The
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Exercises ❘ 561 3. Write a progra
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25 Serialization What’s in This C
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XML Serialization ❘ 565 The Seria
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XML Serialization ❘ 567 // Create
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XML Serialization ❘ 569 Each Orde
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XML Serialization ❘ 571 In the Or
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JSON Serialization ❘ 573 The Data
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JSON Serialization ❘ 575 To deser
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Binary Serialization ❘ 577 Ignore
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Exercises ❘ 579 4. The XmlSeriali
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26 Reflection What’s in This Chap
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Learning About Classes ❘ 583 Cust
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Getting and Setting Properties ❘
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Getting and Setting Properties ❘
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Getting Assembly Information ❘ 58
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Invoking Methods ❘ 591 The follow
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Running Scripts ❘ 593 The program
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Running Scripts ❘ 595 // Generate
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Exercises ❘ 597 Summary Most prog
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Exercises ❘ 599 ➤➤ ➤➤ For
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27 Cryptography What’s in This Ch
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Randomness ❘ 603 through the slot
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Randomness ❘ 605 A 32-bit integer
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Randomness ❘ 607 The program then
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Symmetric Key Encryption ❘ 609 //
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Symmetric Key Encryption ❘ 611 {
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Symmetric Key Encryption ❘ 613 Ho
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Asymmetric Key Encryption ❘ 615 n
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Asymmetric Key Encryption ❘ 617 T
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Exercises ❘ 619 Length Limitation
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Exercises ❘ 621 6. The RandomNumb
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Part VI Appendices ▶▶Appendix A
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ASolutions to Exercises All the pro
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Chapter 3 ❘ 627 When you run the
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Chapter 4 ❘ 629 // Code Block 2 .
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Chapter 5 ❘ 631 } } } // Get and
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Chapter 5 ❘ 633 } }; } public sta
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Chapter 6 ❘ 635 12. The following
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Chapter 6 ❘ 637 The following cod
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Chapter 7 ❘ 639 } case 4: birthst
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Chapter 7 ❘ 641 total += values[i
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Chapter 8 ❘ 643 After selecting t
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Chapter 8 ❘ 645 The query orders
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Chapter 8 ❘ 647 10. Example progr
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Chapter 9 ❘ 649 } get { return _N
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Chapter 9 ❘ 651 In this version,
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Chapter 9 ❘ 653 } } Console.Write
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Chapter 10 ❘ 655 The button’s e
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Chapter 10 ❘ 657 An obvious advan
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Chapter 11 ❘ 659 Chapter 11 1. Yo
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Chapter 11 ❘ 661 5. The “is-a
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Chapter 11 ❘ 663 Person Name Addr
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Chapter 12 ❘ 665 Chapter 12 The e
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Chapter 13 ❘ 667 Chapter 13 1. Fi
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Chapter 14 ❘ 669 } string text =
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Chapter 14 ❘ 671 When the user cl
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Chapter 15 ❘ 673 8. The ListAllPr
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Chapter 15 ❘ 675 2. The Increasin
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Chapter 15 ❘ 677 This code create
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Chapter 16 ❘ 679 } { case 1: Draw
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Chapter 16 ❘ 681 // Make the font
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Chapter 17 ❘ 683 } lst.Items.Add(
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Chapter 18 ❘ 685 The following te
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Chapter 18 ❘ 687 } // Save the te
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Chapter 19 ❘ 689 { // Create an a
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Chapter 19 ❘ 691 private void For
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Chapter 19 ❘ 693 8. The ShowGrand
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Chapter 20 ❘ 695 client.DownloadS
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Chapter 20 ❘ 697 } // Request the
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Chapter 20 ❘ 699 10. The UploadSt
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Chapter 20 ❘ 701 14. The FtpListD
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Chapter 21 ❘ 703 } // Display the
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Chapter 21 ❘ 705 7. The following
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Chapter 22 ❘ 707 3. The FiboTasks
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Chapter 22 ❘ 709 The DeadUnlock e
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Chapter 23 ❘ 711 Chapter 23 1. Th
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Chapter 24 ❘ 713 Chapter 24 1. Th
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Chapter 24 ❘ 715 // Display plant
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Chapter 24 ❘ 717 The code then so
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Chapter 24 ❘ 719 T
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Chapter 25 ❘ 721 This code is rea
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Chapter 25 ❘ 723 [XmlIgnore] publ
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Chapter 26 ❘ 725 } } foreach (obj
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Chapter 26 ❘ 727 The following co
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Chapter 27 ❘ 729 is decrypting, t
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Chapter 27 ❘ 731 11. The EncryptW
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BData Types The following table sum
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Casting and Converting Values ❘ 7
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CVariable Declarations The followin
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Enumerated Type Declarations ❘ 73
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DConstant Declarations Constant dec
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EOperators The C# operators fall in
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Operator Precedence ❘ 745 Bitwise
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DateTime and TimeSpan Operators ❘
Page 793 and 794:
FMethod Declarations This appendix
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Extension Methods ❘ 751 An async
Page 797 and 798:
GUseful Attributes The .NET Framewo
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Other Useful Attributes ❘ 755 Oth
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HControl Statements Control stateme
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Looping Statements ❘ 759 Here:
Page 805 and 806:
IError Handling A program can use t
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J LINQ This appendix provides synta
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Basic LINQ Query Syntax ❘ 765 joi
Page 811 and 812:
LINQ Functions ❘ 767 LINQ Functio
Page 813 and 814:
LINQ to XML ❘ 769 LINQ out of XML
Page 815 and 816:
PLINQ ❘ 771 The following list su
Page 817 and 818:
KClasses and Structures This append
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Events ❘ 775 To create a destruct
Page 821 and 822:
LCollection Classes This appendix p
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Collections ❘ 779 Collections Col
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Iterators ❘ 781 }; } for (int i =
Page 827 and 828:
MGeneric Declarations This appendix
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NPrinting and Graphics This appendi
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Windows Forms Printing ❘ 787 ➤
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Windows Forms Printing ❘ 793 Stri
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WPF Printing ❘ 795 Method LockBit
Page 841 and 842:
WPF Printing ❘ 797 Nullam dapibu
Page 843 and 844:
OUseful Exception Classes When your
Page 845 and 846:
Standard Exception Classes ❘ 801
Page 847 and 848:
PDate and Time Format Specifiers A
Page 849 and 850:
Custom Format Specifiers ❘ 805 Sp
Page 851 and 852:
Q Other Format Specifiers A program
Page 853 and 854:
Numeric Formatting Sections ❘ 809
Page 855 and 856:
Enumerated Type Formatting ❘ 811
Page 857 and 858:
RStreams The .NET Framework provide
Page 859 and 860:
BinaryReader and BinaryWriter ❘ 8
Page 861 and 862:
TextReader and TextWriter ❘ 817 M
Page 863 and 864:
Text File Stream Methods ❘ 819 Me
Page 865 and 866:
SFilesystem Classes This appendix d
Page 867 and 868:
Framework Classes ❘ 823 File The
Page 869 and 870:
Framework Classes ❘ 825 DriveInfo
Page 871 and 872:
Framework Classes ❘ 827 Property
Page 873 and 874:
Page 875 and 876:
Page 877 and 878:
Recycle Bin ❘ 833 FileIO.FileSyst
Page 879 and 880:
TRegular Expressions This appendix
Page 881 and 882:
Regular Expression Options ❘ 837
Page 883 and 884:
Using Regular Expressions ❘ 839 S
Page 885 and 886:
Using Regular Expressions ❘ 841 T
Page 887 and 888:
UParallel Programming This appendix
Page 889 and 890:
Tasks ❘ 845 Parallel.For The Para
Page 891 and 892:
Threads ❘ 847 ➤➤ ➤➤ Call
Page 893 and 894:
VXML This appendix summarizes usefu
Page 895 and 896:
Writing XML Data ❘ 851 Document O
Page 897 and 898:
Writing XML Data ❘ 853 Method Des
Page 899 and 900:
Reading XML Data ❘ 855 Property A
Page 901 and 902:
Related Technologies ❘ 857 ➤➤
Page 903 and 904:
WSerialization This appendix summar
Page 905 and 906:
JSON Serialization ❘ 861 Attribut
Page 907 and 908:
Binary Serialization ❘ 863 Binary
Page 909 and 910:
XReflection A class’s type provid
Page 911 and 912:
Type ❘ 867 Property IsValueType I
Page 913 and 914:
Type ❘ 869 Method GetNestedType G
Page 915 and 916:
MethodInfo ❘ 871 Method AddEventH
Page 917 and 918:
FieldInfo ❘ 873 FieldInfo A Field
Page 919 and 920:
ParameterInfo ❘ 875 Property Defa
Page 921 and 922:
Index Symbols + (addition) operator
Page 923 and 924:
attributes - Bitmap class Flags, 75
Page 925 and 926:
Class View - classes Class View, 31
Page 927 and 928:
CollectionDataContract attribute -
Page 929 and 930:
data types - Debug menu data types,
Page 931 and 932:
delegate keyword - DownloadFileTask
Page 933 and 934:
#endif directive - exception classe
Page 935 and 936:
FileInfo class - FirstOrDefault met
Page 937 and 938:
global namespace - inheritance glob
Page 939 and 940:
lambda expressions - LINQ L lambda
Page 941 and 942:
memory - methods, ConvertAll memory
Page 943 and 944:
methods, GetResponseStream - method
Page 945 and 946:
NameValueCollection class - operato
Page 947 and 948:
ParameterInfo class - precedence of
Page 949 and 950:
properties, FieldInfo class - prope
Page 951 and 952:
protected internal keyword - #regio
Page 953 and 954:
Serialize method - statements XML,
Page 955 and 956:
StringWriter class - Task class Str
Page 957 and 958:
TryEnter method - Type class TryEnt
Page 959 and 960:
virtual keyword - XDocument class v
Page 961 and 962:
XmlArray attribute - XSLT SOAP (Sim
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C# 5.0 Programmer's Reference

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