Whats New In C Sharp 4 And Vb 10

Visual Studio 2010and

.NET Framework 4

Training Workshop

Visual Studio 2010and

.NET Framework 4

Training Workshop

What’s New InC# 4.0 and Visual Basic

10

What’s New InC# 4.0 and Visual Basic

10NameTitleOrganizationEmail

Where We’re At TodayWhere We’re At Today

Our managed languages are starting to share some very similar features:

Functional

Concise

Declarative

Before

IList<Person> FindParentsWithChildNamed(string childName)

{var matches = new List<Person>();

foreach(var person in _people) { foreach(var child in person.Children) { if (child.Name.Equals(childName)) { matches.Add(person); break; } }

}return matches;

}

LINQ, The Power of Declarative

LINQ, The Power of Declarative

IList<Person> FindParentsWithChildNamed(string childName) { var matches = from person in people from child in person.Children where child.Name.Equals(childName) select person;

return matches.ToList();}

After

LINQ, The Power of Declarative

LINQ, The Power of Declarative

Why Declarative Matters…Why Declarative Matters…

Imperative Declarative

What

How

Addressing Language TrendsAddressing Language Trends

Declarative

Concurrent

Dynamic

The Evolution of C#The Evolution of C#

C# 1.0

C# 2.0

C# 3.0

Managed Code

Generics

LINQ

C# 4.0

Dynamic

New C# 4.0 FeaturesNew C# 4.0 Features

1. Late-Binding Support

2. Named and Optional Parameters

3. Improved COM Interop

4. Covariance and Contravariance

Simplifying Your Code with C# 4.0

Simplifying Your Code with C# 4.0

Co-evolving C# and VBCo-evolving C# and VB

Think of co-evolution as a game of leap-frog…

There’s a problem when co-evolution doesn’t

exist…

The Evolution of Visual BasicThe Evolution of Visual Basic

VB1 – VB3

VB4-VB6

VB7-VB9

Windows ProgrammingMade Easy

ComponentsMade Easy

Power andSimplicity for

.NET

VB10

Continuing the trend

New VB10 FeaturesNew VB10 Features

1. Auto-Implemented Properties

2. Collection Initializers

3. Statement Lambdas

4. Covariance and Contravariance

5. Implicit Line Continuation

VB 10VB 10

Why a “Dynamic Language Runtime”?Why a “Dynamic Language Runtime”?

Common Language Runtime

Statically-Typed

C#VB

RubyPython

Dynamically-Typed

Why a “Dynamic Language Runtime”?Why a “Dynamic Language Runtime”?

Common Language Runtime

Statically-Typed

C#VB

RubyPython

Dynamically-Typed

Dynamic Language Runtime

PythonBinder

RubyBinder

COMBinder

JScriptBinder

ObjectBinder

.NET Dynamic Programming.NET Dynamic Programming

Dynamic Language Runtime

Expression TreesDynamic Dispatch

Call Site Caching

IronPython

IronRuby C# VB.NET Others…

Dynamically Typed ObjectsDynamically Typed Objects

Calculator calc = GetCalculator();int sum = calc.Add(10, 20);

object calc = GetCalculator();Type calcType = calc.GetType();object res = calcType.InvokeMember("Add", BindingFlags.InvokeMethod, null, new object[] { 10, 20 });int sum = Convert.ToInt32(res);

ScriptObject calc = GetCalculator();object res = calc.Invoke("Add", 10, 20);int sum = Convert.ToInt32(res);

dynamic calc = GetCalculator();int sum = calc.Add(10, 20);

Statically typed to be

dynamic

Dynamic method

invocation

Dynamic conversion

Dynamic Language InteropDynamic Language Interop

Summary…Summary…

1. Targeting the current trends in programming languages

2. Addressing current pain points in developing for Windows and the .NET Framework

3. Laying the foundation to enable developers to solve tomorrow’s problems