Eric VogelSoftware Developer

A.J. Boggs & Company

What’s new?New Projects for .NET 3.0 and 3.5Framework build targetingJavascript IDE enhancementsBuilt in Unit Testing! New language additions to C# and VB

New ProjectsWindows

WPF Web

ASP.NET AJAXWCF Service

OfficeOffice 2007

WorkflowSmart Device

Target .NET 2.0,3.0, and 3.5 Compact Frameworks.Windows Mobile 5.0, 6.0 SDK as free download.

.NET 3.0Windows Presentation Foundation (WPF)

Windows Forms replacement. Controls are expressed in XAML.Provides a more expressive UI layer for

applications.Windows Communication Foundation (WCF)

Bridges networking APIs (Web Services, .NET Remoting,..) into one API.

Very configurable, supports multiple transport layers such as http and tcp.

SOAP 1.1 and 1.2 complient.

.NET 3.0 (continued)Work Flow (WF)

Allows graphical design of sequences and state machines.

Good for expressing business processes.Card Space

Security identification service that stores users identification information.

WCF supports Card Space.

.NET 3.5 New language additions to C# 3.0 and

VB .NET 9.0LINQ ASP .NET AJAXWF support in WCF Services

Host Work Flow in a WCF Service

Framework build targetingCompile projects to target a specific .NET

Framework.Supports .NET 2.0,3.0, and 3.5

Javascript IDE EnhancementsIntelliSense support addedEasier to debug codeDemo

Unit TestingOnly included in Pro and Team Editions.Can create tests for Web, Desktop, and

Mobile applications.Demo

New in C# and VB .NETImplicitly typed local variablesObject intializersArray initializersAnonymous typesExtension MethodsLambda ExpressionsLINQ

Implicitly typed local variablesVariable declarator must have an intializerType is inferred by the initialization of the variableVariable cannot be initialized to nullExamples:

C#var foo = 5;var bar = “Hello GLUG .net”;var foobar = new List<int>();

VB Dim foo = 5;Dim bar = “Hello GLUG .net”;Dim foobar = New List(Of Integer)

Object initialzersInitialize properties and accessible members

of an object.Nice substitute for overloaded constructors.Can be embeddedExamples:

C#var voyager = new Ship{Capacity=1000, Shields=200};

VBDim voyager = New Ship With {.Capacity = 1000, .Shields = 200}

Implicitly typed arraysThe type of the array is determined by its

initialized content.Examples:

C# var scores = new[] { 50, 60, 70, 70, 80, 90, 100 };

VBDim scores() = { 50, 60, 70, 70, 80, 90, 100 }

Anonymous TypesCreate objects with anonymous types.Anonymous types inherit from Object.Examples:

C#var item = new { Id=10, ItemType="Game",

Cost= 29.99 };VBDim item = New With {.Id = 10, .ItemType =

"Game", .Cost = 29.99}

Extension MethodsStatic method that extends an existing class.Invoked as if it were an instance method of

the class being extended.Shadowed by member methods of the

extending class.Only allowed access to public members of the

extending class.

Extension Methods (C# example)Example:

public static class ExtensionMethods { public static bool GreaterThan(this int i, int n) { return i > n; } }

int num = 5;num.GreaterThan(2); // will return true, since 5 is greater than 2

Extension Methods (VB example)Example:

Imports System.Runtime.CompilerServices

Public Module ExtensionMethods <Extension()> _ Public Function GreaterThan(ByVal i As Integer, ByVal n As Integer)

As Boolean Return i > n End FunctionEnd Module

Dim num As Integer = 5 num.GreaterThan(2) ) ‘ will return true, since 5 is greater than 2

Lambda ExpressionsC# (input parameters) => { expression or statement block }VB Function(input parameters) expression or statement block

Provide a cleaner and more concise expression of anonymous methods.

Parameters can be explicitly or implicitly typed.Have a million and one uses!Demo

LINQ Language INtegration Query or LINQ

introduces the ability to query objects directly in the language.

Syntax is very similar to SQL.Visual Studio 2008 currently has LINQ to

SQL, LINQ to XML and LINQ to Objects.Demo of LINQ to Objects.

C# only additionsCollection IntializersAutomatic properties

Collection InitializersCollection must implement IEnumerable.Each item is added to the collection behind

the scenes by calling the Add method of the collection.

Examples: List<string> names = new List<string> { “Eric”, “Jeff”, “Joe” };List<int> scores = new List<int> { 50, 60, 70, 70,

80, 90};

Automatic PropertiesMore concise way to create a Property with a

backing field.New default code snippet for prop in VS

2008.Examples:

public int NumDays { get; set; }public DateTime DueDate { get;

set; }

VB .NET only additionsXML LiteralsRelaxed Delegates

XML literals XML is able to be used as a literal.IntelliSense support, including schemas.Tight integration with LINQ to XML.Examples:

Dim products = <Products> <Product name="CodeSmart"> <Id>20</Id> </Product> </Products>

Dim appConfig = <?xml version="1.0" encoding="utf-8"?> <configuration> </configuration>

Relaxed DelegatesMethods no longer have to exactly match

their method delegate signatures.Methods can have a derived type of what is

defined in the delegate as a return type (covariance).

Methods can be passed arguments with types that are base classes of the arguments specified in the delegate signature (contravariance).

Covariance Example Public Class Record End Class

Public Class Person Inherits Record End Class

Public Delegate Function RecordChanged(ByVal Id As Integer) As Record

Public Function GetChangedRecord(ByVal Id As Integer) As Record Return New Record End Function

Public Function GetChangedPerson(ByVal Id As Integer) As Person Return New Person End Function

Sub Main()Dim changedPerson As RecordChanged = AddressOf GetChangedPerson

End Sub

Contravariance ExamplePublic Delegate Sub PersonSelected(ByVal Person)

Public Sub RecordSelected(ByVal Record) End Sub Sub Main() 'Contravariance Dim personPicked As PersonSelected =

AddressOf RecordSelected End Sub

Contactvogelvision@gmail.comhttp://ericvogel.comTwitter - @vogelvision

ReferencesOverview of C# 3.0

http://msdn.microsoft.com/en-us/library/bb308966.aspx#csharp3.0overview_topic1

Overview of Visual Basic 9.0http://msdn.microsoft.com/en-us/library/

ms364068(vs.80).aspx#vb9overview_topic1Programming C# 3.0

Jesse Liberty & Donald Xie, O’ReilyThe LINQ Project

http://msdn.microsoft.com/en-us/netframework/aa904594.aspx