O

Object Browser window, Visual

Studio 2005, 420–421

object class, 106

object creation operator, 156

object lists

LINQ queries to access, 1683

traditional queries across, 1676–1679

object orientation (OO)

fundamentals of, 30

IL and, 8–9

object sinks, 1421

ObjectDataProvider, 1197–1198, 1207

objects

activation in .NET Remoting architecture, 1417–1419

as class instance, 197

class members and, 84–85

classes and structs for creating, 84

constructors, 94–96

constructors called from other constructors, 98–99

context-bound, 1405–1406

data members, 85

declaring methods, 86–87

function members, 85–86

initialization, 1699–1700

invoking methods, 87–89

method overloading, 91–92

object class, 106

output parameters, 91

overview of, 83

partial classes, 104–105

passing in remote methods, 1421–1425

passing parameters to methods by reference, 90

passing parameters to methods by value, 89–90

pooling, Enterprise Services, 1457

predefined reference types, 45–46

properties, 92–94

readonly fields, 99–100

remote. See remote objects

static classes, 105–106

static constructors, 96–98

structs and, 101–104

System.Object methods, 106–107

ToString( ) method, 108–109

objects, Active Directory

collections, 1601–1602

creating, 1603–1605

global catalogs searching for, 1587–1588

globally unique identifier, 1598

hierarchical ordering of in domains, 1586

overview of, 1585

Of keyword, 1649–1650

OLE DB Provider, 1668–1671

OLE/COM Object Viewer, 772

OleDbCommand class, 867

OleDbConnection class, 851

OleDbDataReader class, 867–869

OnAddBook( ) method, 1204–1205

OnApplyResource( ) method, 1166

OnCallback( ) method, duplex communication, 1538

OnContinue( ), Windows Services handler methods, 724

OnCustomCommand( ), Windows

Services handler methods, 725

onDoubleClick( ) override, 1125

OneWay attribute, asynchronous remoting with, 1442

online resources

Microsoft Application Center Server, 1455

Reflector, 855

tcpTrace tool download, 1411

third-party tools for debugging JavaScript, 1331

Windows Workflow downloads, 1581

OnOpenBookDialog( ) method, 1196

OnPaint( ) method

CapsEditor example, 1119–1120

clipping region and, 1080–1082

editing text document, 1119–1120

enumerating font families, 1110–1111

Invalidate( ) method vs., 1116–1117

overriding ActivityDesigner, 1555

painting shapes using, 1079–1080

working around debugging problem, 1087–1088

OnPause( ), Windows Services handler methods, 724

OnPowerEvent( ), WindowsServices handler methods, 725

OnShutdown( ), Windows Services handler methods, 724

OnStart( ), Windows Serviceshandler methods, 724

OnStop( ), Windows Serviceshandler methods, 724

OO (object orientation)

fundamentals of, 30

IL and, 8–9

OOP extensions, JavaScript AJAX Library

classes, 1326–1327

inheritance, 1327–1328

namespaces, 1326

user-defined types, 1328

Open( ) method, service host, 1517

open standards, Active Directory, 1584

open unlocked state, statemachine workflows, 1566–1568

OpenRead( ) method

downloading files using WebClient, 1340

WebClient example of, 1340–1341

OpenSubKey( ) method

RegistryKey class, 832

SelfPlacingWindow application using, 838

OpenWrite( ) method, WebClient example of, 1341–1342

operating systems (OSs), requirements for .NET-based applications, 443–444

OperationBehavior, service implementation, 1532

OperationContract property, service contract, 1523–1524

operators

boxing and unboxing, 168

cast operators. See cast operators

checked and unchecked, 159–160

comparison operators, overloading, 178–180

defining class functions, 86

duplicating symbols for representation of, 333

equality, reference vs. value types, 169–170

explicit conversions, 165–168

how they work, 172–173

implicit conversions, 164–165

is operator, 160

LINQ query, 1687, 1689–1693

list of available, 156

list of available for overloading, 180

null coalescing operator (??), 162

nullable types and, 161–162

as operator, 161

overloading, 171–172

overloading examples, 175–178

overview of, 155–157

pointers and, 333

precedence, 162–163

shortcuts, 157–159

sizeof operator, 161

ternary, 159

type conversions, 164

type safety, 163

typeof operator, 161

vector struct example of operator overloading, 173–175

Orcas, 1305

OrderBy( ) extension method, LINQ, 1693

orderby expression, LINQ, 1691–1693

OrderControl component, 1472–1473

OrderData component, 1473–1475

OrderLineData component, 1476–1477

OSs (operating systems), requirements for .NET-based applications, 443–444

out keyword

C#, 1630

outputting parameters, 91

out parameter, 1425

output parameters

calling stored procedure that returns, 864–866

returning from workflow, 1569–1570

outsourcing translations, 666

overloading

constructors, 95

GetChanges( ) method and, 895

method overloading, 91–92

StringBuilder class, 227

overloading operators

comparison operator, 178–180

examples, 175–178

how operators work and, 172–173

list of operators available for, 180

overview of, 171–172

vector struct example, 173–175

override keyword, overriding functions, 115