Nuno Filipe Godinho : VS2010

PDC09 – Day Two – Windows Workflow Foundation 4.0 from the Inside out

NunoGodinho — Thu, 19 Nov 2009 00:15:25 GMT

Bob Schmidt – Program Manager

For WF4:

Programs are data
Scheduler-based program execution
- stackless & serializable
Runtime-mediated code rendezvous
Natural Control flow
- run it the way you think of it

Authoring

WF is an activity

Can author programmatically or using XAML
Can contain other activities
Separate base classes for activities that return a value

WF program is a definition from which many instances can be created

Each instance of an activity has a unique environment (visible data values)

Execution

WF runtime just sees activities and not sequence or parallel or recurrence

WF runtime is a referee that enforces the rules of the work
CacheMetadata is how an activity describes itself

WF runtime knows when an activity is done
An activity can schedule the execution of a child activity and be notified upon its completion

There can be multiple, distinct method invocations per activity
Can Express all kinds of patterns (control flow)

There can be multiple paths of invocation …

Scheduler

WorkItem represents the invocation of a method
WorkItems can be created by:

Activity Code
External Code

Flow of execution

The Activity Code or the External Code Add a WorkflowItem
Them the elements get Pushed or Enqueued for execution
Afterwards the Scheduler will Pop it and execute it

Details

Scheduler per program instance
Manages an ordered list of work items

Threading Model

One thread at a time is used to process work items for a program instance

Simplifies the programming model of activities
Thread may differ work items in the same instance

WF runtime uses host-provided SynchronizationContext
Standard TLS mechanisms do not apply to WF

Instead use WF Execution Properties – names properties visible for a part of a workflow
Attached / detached from the current environment by the WF runtime before / after work item invocation

Activities should not block this thread

Bookmarks

Problems

What happens when your programs need to wait for input?
We want a “Zero footprint” WaitForInput()

Bookmark

A named resumption point in a WF program
Resumption will schedule an activity’s callback method
WF runtime mediates resumption – no need for the instance to be in memory

WCF Receive activity is built on top of bookmarks in order to give access to this possibility when using Workflow Services

Persistence

lets you pause an instance, save it somewhere & resume it later

has no affinity to a WF host instance, CLR instance, thread, process or machine

instances of WF are serializable

A CLR Stack is not serializable, but in WF program a stack only exists transiently, during work item execution

Sometimes you want a “no persist zone”

Automatic during execution of an async activity

Details of persistence are deliberately separate from the machinery of WF runtime

Serializable Instances

Contains

Work Item list
Bookmarks
Data (arg and values)

Environment for all executing activity instances

Activity instance info (callbacks, execution props)
Custom Data from persistence participants

Doesn’t contain

Workflow Definition
Why?

several instances can share the same workflow definition
management of definitions is responsibility of the host

PDC09 – Day Two – Developing Advanced Applications with Windows Azure

NunoGodinho — Wed, 18 Nov 2009 22:56:04 GMT

Steve Marx – Technology Strategist

Now we can have the ability to have more than a Web and a Work Role, since we have several different types of Roles.

Example:

IIS Role
SMTP Role
…

Now the there is the new Storage API that is currently being shipped with the SDK and not only a sample.

Some new features:

Inter-role communication
Non-Http endpoints
Role instance lifecycle
VM Sizes
Full-trust in the Cloud
Local Storage

Upgrading the local storage

How to model you application

Draw the boxes and arrows
Each box is a role

Which receive traffic from the internet
Which need IIS?

Receive Traffic: Input Endpoints

Different ports on same domain
There’s always load balancing
Declared in ServiceDefinition.csdef
Handled by IIS

InputEndpoint

Defined the protocol, port and name of the endpoint that will opened in order to listen for the requests
Protocols supported

Http
Https
Tcp

RoleEnvironment is the class that allow us to communicate with the Windows Azure fabric, for example in order to know the Configurations

Aside about Email

Spammers will use Windows Azure then the IP ranges can get blacklisted

Best Practices: Use a relay service in order not to have your mails marked as SPAM

Send mail via a rely mail
Receive mail is fine

Searching

Lucene.NET

Popular search API
.NET port of original Java implementation

Index data

Bring index up to speed on startup
Continually update index

Serve searched (via WCF)

Asynchronous Work without a Queue

Queues deliver messages to one worker only
We need every worker to see the message

Solution

use Table instead

Build your own secondary index
Order references

Initialization of Roles

Now we have:

OnStart() – “busy” state, initialization
Run() – do work
OnStop() – traffic stops, graceful shutdown

Internal Endpoints

Declare endpoints in ServiceDefinition.csdef
API to find out what port to listen on RoleEnvironment in Order to know if the port or anything change about the endpoint since the last call

How to Get More RAM

RAMDiectory pouts everything in memory
Choose the VM Size:

Small
Medium
Large
Extra-Large

PDC09 – Day Two - Keynote

NunoGodinho — Wed, 18 Nov 2009 19:04:10 GMT

Steven Sinofsky

Developing Windows 7

Learning

Solving Problems + Innovation
“Engineering 7” Blog made a very interesting Dialog even without having any code of the product, just about the decisions that were being made
Ecosystem Readiness
Developer Pre-Beta, Beta, RC rhythm
Telemetry

Telemetry

Seed Feedback Button
Hardware and Device Diagnostics
Reliability Analysis Component (RAC)
Software Quality Monitor (SQM)
Windows Error Reporting (WER or “Watson”)

Developing Internet Explorer

Learning

Responsible Engineering
Trustworthy computing
Real-world Interoperability
Innovative Technologies

Updates

Standards Progress

ACID
HTML 5

Performance Improvements

Javascript

Ecosystem Innovations

IE 9 with 3 weeks of development is looking interesting in terms of performance and interoperability
Using Direct2D and DirectWrite to provide better graphics rendering and Hardware Acceleration without any change of the current sites

Windows 7 Call to Action

Integrate with Windows 7 Desktop
Develop 64-bit
Focus on fundamentals in your code
Build on new APIs in Windows 7
Watch more videos today on Channel 9 about Internet Explorer 9

Scott Guthrie – Developer Division

Silverlight 4

Focus

Media

Web and and Microphones

gives you access to the raw access to the input and so you can make the changes you want on that stream, like using PixelShader with it

Multicast streaming

IIS Smooth Streaming

Silverlight Media Framework available today on CodePlex

Output protection
Offline DRM support

Business Applications

Printing

Print Preview Dialogs
Printing Configurations
This is a Print API that you can change however you want and not only a screenshot of the screen

Rich Text
Clipboard access

Local and Central clipboard support

Right Click
Mouse Wheel
Implicit Styles
Drag and Drop
Drop Targets support
Bidi & RTL
HTML

Hosting HTML inside Silverlight application
We can interact with the HTML contents as being a brush

Commanding and MVVM
Data & Networking

Sharing Assemblies across SL and .NET 4.0
Data Binding Improvements
UDP Multicast support
REST Enhancements
WCF Improvements

Main one is TCP channel support

WCF RIA Services

All the capabilities of RIA Services and with all the capabilities of WCF
Works well with OAuth

Visual Studio 2010

WYSIWYG Design Surface
XAML Intellisense
WF and POCO Support

Additional Control
Beyond the Browser

Windowing API
Notification Popups
HTML support
Drop Target support
Opening the Sandbox

Trusted Application

Custom Windows Chrome
Local File System
Cross-file Network
Keyboard support in Full Screen Mode
COM object support in Windows

using dynamic keyword of C#

Access to Several devices form the client machine

Silverlight Performance

Twice as fast

uses JIT like the normal .NET Application

30% faster startup
New Profiling support

Google Chrome will support SL4 also

Schedule

Beta

All the features seen today
VS2010 Tools
Expression Tools

RC
Final Release

First half of Next Year (MIX’10 ????)

Kurt DelBene – Office and Sharepoint 2010

Microsoft Business Productivity Infrastructure

Unified Business Platform

Unified Communications
Business Intelligence
Enterprise Content Management
Collaboration
Enterprise Search

Office and Sharepoint Development Platforms

User Experience

Based in Services and in a Object Model that can be extended in order to create better User Experience

Application Services

Expose all the capabilities in the Applications as services to be consumed without loosing any of the features that we have access inside the solution

Content and Data Management
Interoperability with LOB integration

possibility to more easily integrate the external LOB applications inside the products

Tools and Deployment Flexibility

New Tools for Sharepoint Development
Debug capabilities are currently in the Tools

Now Debug really works. Awesome.

Interesting capability to import a Sharepoint solution to start the project
Possibility to deploy the solution in a sandboxed solution. Interesting in terms of security
Deployment

Simply upload the package generated by Visual Studio 2010 into the sharepoint – Real All-in-One working for deployment also. Now it looks really good for Sharepoint Development.

Announcing the Office and Sharepoint 2010 Public Beta to download www.microsoft.com/2010

Office 2010
Sharepoint Server
Project Server 2010
Visio 2010
Mobile is also available today in the mobile marketplace

Sharepoint has a Silverlight WebPart out of the Box.
Sharepoint 2010 now has the Office Ribbon

Announcing Duet Enterprise for Microsoft Sharepoint and SAP

Consume and extend SAP from Microsoft Sharepoint 2010
Available on the Second-half of 2010

Announcing the Outlook Social Connector

Windows Live, Sharepoint Server, Linkedin
Has an Open SDK that can be used to develop new connectors for this connector

PDC09 – Day One – Code Visualization, UML and DSLs

NunoGodinho — Wed, 18 Nov 2009 01:31:12 GMT

Cameron Skinner – Product Manager in Visual Studio, responsible for the Architecture Tools in VS2010

Why?

Complexity remains a serious problem

Found everywhere

Code
Requirements
Organizational Politics
and so on…

VS2010 attacks these problems by increasing

Shared understanding between team members
the understanding of existing systems
the ability to gain and maintaining the control over it

Who?

Developers are trying

to understand existing code
focused on the “right fix”

Architects are trying

to understand the Domain and how it relates to implementation
get the solution for the existing projects

Product Capabilities

“Understand the Code”

Architecture Explorer
Sequence Diagram Generation
DGML Graphs and “Standard” Graphs

“Maintain Control”

Layer & Diagram & Custom MSBuild Tasks
Work Item Integration

“Understand the Domain”

UML 2.x Designers

All this capabilities are only in the Ultimate version of VS2010

“Understanding the Code”

In Visual Studio Options, “Mark the Show Misc Documents in Architecture Explorer”

Dependency Diagram

Very interesting Dependency Diagram that represent you application and all the interaction of the solution and you even can search who in your solution is using a specific assembly and what is being made with it.

If we use MEF, Unity or any other Dynamic connection this won’t be possible to see in the Dependency Diagram, since it currently represents only the static dependencies.

Think of Dependency Diagram as read-only, since if you make any change on it he won’t change any of the code of the solution associated.

The Dependency is a DSL that was generated for this version of VS2010.

We can select just the elements that we want to view in the Dependency Diagram and define which level of information we want to have, like:

Assemblies

Namespaces

Types

Methods

We can even filter by access modifiers:

public

private

protected

internal

protected internal

We can navigate to the code from the Dependency Diagram.

Doesn’t work on unmanaged C++, but is currently being done but no date for the release now.

We can interact with the Diagram and extend the DGML model but in a simple model

Possibility to define the level and the center of the dependency that you want to see

Butterfly mode enables the viewing of only the types that are just linking to your central defined element

We can generate the Dependency Diagram based on a Custom selected elements

Note: We can Calculate the Complexity by right-clicking on the Project and selecting the “Calculate Complexity” option of the Context Menu, but this isn’t currently available inside the Dependency Diagram.

Architecture Explorer

Capabilities to filter information about your solution

Ability to look at the Logical and Physical View of the Solution Projects and filtering what you want to filter in terms of inbound or outbound navigation, and this way we’ll have more information's about how our solution is working and how we can maintain it.

Sequence Diagram

Now you have the ability to define the depth of the diagram in terms of levels and them expand if you want more directly on the diagram

Designed to be collaborative and to persist the changes made on the Model, and it will identify the changes that were made on the diagram and associate that change to a new Work Item.

Works on all versions of .NET Framework

Doesn’t generate the code on by changing the Sequence Diagram, just identifies the changes that need to be done

“UML Diagrams”

There’s a new Modeling project in VS2010 that will have all the Diagrams
State Diagrams will be supported as well as all other diagrams from UML
UML Diagrams supported in this version of VS2010:

Use Cases
Class Diagram
Sequence Diagram
Activity Diagram
Component Diagram
Layer Diagram

Very interesting to define the architecture
Capability to validate the architecture by doing static code analysis in order to check all the dependencies and references between the several Layers, and defining the architectural problems as errors in the Error List.
We can get a visual information regarding the layers that are invalid due to the architectural validation
Just for static elements right now, but can be made by extending the pipeline of the Validation of the models

Very interesting Session and a great step for getting real architecture tools inside Visual Studio.

PDC09 – Day One – SQL Azure Present & Futures

NunoGodinho — Tue, 17 Nov 2009 23:37:57 GMT

Data Platform as a Service

In the future will have Reporting, Data Analytics

SQL Azure Database

Relational Database service

SQL Server technology foundation
Scalable
Symmetrical

SQL Azure Provisioning

Each account has zero or more servers

Azure wide provisioned in a common portal
Billing instrument

Each server has one or more databases

contains metadata about the databases
Unit of authentication and security
Unit of Geo-location
The server is a logical grouping of you DBs

Each database has standard SQL Object

Unit of consistency
Contains users, tables, views, indexes, and so on,

Global Availability

North Europe
Southeast Asia
North and South USA

Futures

Goal: Provide and end-to-end experience for enterprise departmental apps and Saas ISVs scenarios
Improved Tools

Today we have

VS, SSMS, ADO.NET, ADO.NET Data Service

Data Backups

Multiple replicas of all databases with automatic failover. System backups for additional protection
Use Database Clone to create a clone of the Database with every capabilities of the original one
During 1H 2010

Continuous Backups

Configurable retention and lag period
Backups available for read operations
Local and regional options
During 2H 2010

Operational Models

SaaS

Provisioning APIs for ISVs
Template database support
Meta-data tracking
Additional billing scenarios

Scale-out support –Today

Databases and workloads partitioning is a classic

Better price/performance
Levels of throughput not possible with a single machine

What SQL Azure addresses

Highly available service on top of commodity hardware
Zero administration

There will be available several options and the 10GBs of space is not an issue

Customer Feedback

Add support for profiler, DMV’s
SQLCLR
and much more

Codename “Vidalia”

Sharing to trustworthy collaboration

Cloud is a grate place to connect
Empowers multiple parties
Businesses need control

Very interesting demos, need to see more about it.

Geneva Framework goes WIF – Windows Identity Foundation

NunoGodinho — Tue, 17 Nov 2009 00:41:31 GMT

Geneva Framework has received a name change and now is called WIF – Windows Identity Foundation, since is the technology that will work with all types of Identity in the Microsoft world.

“It provides developers pre-built .NET security logic for building claims-aware applications, enhancing either ASP.NET or WCF applications. Windows Identity Foundation makes it easeir to build richer, more secure applications (cloud and on-premise) without being a security and identity expert. It will boost developer productivity, as a result, and enhance app security through a standard approach to federation, strong authentication and identity delegation.”

I’ve made a simple wrap-up of the several interesting articles about WIF, and they are:

Listen about WIF on .NET Rocks
Download the RC of the WIF here.
Learn more about the Id Element.
Cool sample using WIF on FabrikamShipping application
Download the WIF RC Training Kit here
See Claims-Driven Modifier Control

“Simple ASP.NET server control which allows you to use identity for driving the behavior of your frontend UX, without requiring you to see even a single line of code”

Have good reading and tests with WIF

Entity Framework 4.0 News

NunoGodinho — Mon, 16 Nov 2009 18:05:50 GMT

In the last few days I’ve been seeing several element of the Entity Framework 4.0 that come with the .NET 4.0 and I there are several interesting news that I thought I could wrap up a little bit in this post, and so lets start with the news.

Providers made for version 3.5 will work unmodified
- Great news for all the ones that develop their own custom providers in order to work with Entity Framework, and of course a nice information to know that the provider model is not being changed on this version.
- In order to know more about the several changes read here.

New CTP for the ADO.NET Entity Framework Features that work with Visual Studio 2010 Beta 2 version
- Interesting news since in some cases we needed this in order to continue working with features like Self-Tracking Entities, and some new stuff is also here, like enhancements in the Code-Only EF model, in terms of:
  - Fine grained control over the model
    - Specify Navigation Properties inversed
    - Property Facets
    - Complex types
  - Customizing Mappings
    - Change Table and Column Names
    - Custom inheritance
    - Entity Splitting
    - Joining Table Mapping
- Read more here

Model First with Entity Framework
- Now we can develop our EF model first and even extend the Database Generation Workflow and DDL generation Template.
  - This is very important and shows how this EF version is extensible and lets us define what we want to happen, and how it will happen, and this is a great power for the ones that are using EF or using other ORM technologies and need more power into their models.
  - Uses WF 4.0 as the way to provide extensibility for the Data Generations. Very interesting indeed.
- A very good post of the PM of the Entity Designer of the EF, Noam Ben-Ami here.

Foreign Key Relationships
- This has always been a challenge with the different ORM technologies that I’ve used, and in the EF 4.0 a lot is being change, from using Implicit Associations to Explicit Associations.
  - “In .NET 4.0 we’ve added support for FK Properties and FK Associations to the Entity Framework. It’s still possible to use Independent Associations and the two can be mixed in models. We’re excited to offer FK Associations because they simplify many common Entity Framework coding tasks. Hopefully this walkthrough has given you a feel for how you can use FK Associations and Properties.”
- Read more about this here.

Automatic Generation of Stored Procedures Return Types
- Sometimes we need for a stored procedure to return several values, like a table, and in order to make this easier the EF team decided to provide a way to easily return a collection of complex types from Stored Procedures, and so in this new version the designer allows us to define with type of results the Store Procedure will return and then it will generate the need type on the Database.
- Very interesting also, read more here.

Walkthroughs about Code-Only and Self-Tracking Entities.

Hope this helps you knowing a little more about Entity Framework 4.0 and where to find more information’s.

TechEd EMEA 2009 – Session “Deep Dive in Windows Workflow Foundation 4.0” – Part 2/4

NunoGodinho — Mon, 16 Nov 2009 04:59:07 GMT

After the part 1 in which we talked about the Changes from WF 4.0 Beta 1 to Beta 2, in this part 2 we will talk about the new Flowchart Workflow.

And so first of all let’s start by identifying the challenges that we currently have when using Workflow development, and they are:

Defining Workflows based on flowcharts made by Business Analysts and Users
Making Workflows easier for Business Analysts and user validation
Unit Testing Workflows

In order to do this I’ve started by searching the web about samples of flowcharts built by Business Analysts, and I’ve found this one here.

In order to do the same sample as me in the presentation, just follow the demo script that is attached to this post.

As a summary we can look at Flowchart like:

Typically used to implement non-sequential workflows, or in order words we can think of it as a loopback sequential workflow in which in we can define that an element of the sequence can loopback to a previous sequence element.
Can also be used for sequential workflows if no FlowDecision nodes are used
A Flowchart activity is an activity that contains a collection of flow nodes that inherit from FlowNode.
FlowNode types:
- FlowStep
- FlowDecision
- FlowSwitch
Single path of execution (each activity can only transition to one and only one activity)
Provides a more literal translation (“The way in which I think about my process is the way in which I write it down”)
Power + Simplicity
Similar to how you would draw a process in a whiteboard or Visio

DemoScriptFlowchart.docx

Interesting reading about Entity Framework 4.0

NunoGodinho — Mon, 06 Jul 2009 21:36:53 GMT

Entity Framework has suffered great changes and in order to know more about them I recommend the following reading:

POCO (Plain Old CLR Object or Persistence ) in the Entity Framework 4.0

Sneak Preview: Persistence Ignorance and POCO in Entity Framework 4.0
POCO in the Entity Framework:

“Why is POCO important in Entity Framework? Is important because now we have the ability to really separate the Storage Model from the Conceptual Model, and being the Conceptual Model our normal CLR Objects, that was not possible in previous versions of Entity Framework. This is a huge breakthrough for this 4.0 version. Is not perfect, and in this technologies it never is but it’s very interesting”

Part 1 - The Experience (Explains how to make this two parts of the POCO experience with Entity Framework 4.0, from making the Model to the designing of the POCO entities, as well as answering some interesting questions)
Part 2 – Complex Types, Deferred Loading and Explicit Loading (Goes further in the POCO entities and make changes shows how to implement Complex Types as well as configuring the Loading by using Deferred/Lazy Loading or Explicit Loading)
Part 3 – Change Tracking with POCO (Explains furthermore how the Change Tracking, that is so important in Entity Framework, works in POCO entities and how can it be configured by using Metadata)

Using Repository and Unit of Work patterns with Entity Framework 4.0 (Explains how to implement common patterns like Repository and Unit of Work using Entity Framework 4.0)
Entity Framework Feature CTP 1 (Announcement of the Entity Framework CTP Features for .NET 4.0 Beta 1)

Feature CTP Walkthrough: Self Tracking Entities for Entity Framework (Explains the scenarios on where to use the Self Tracking Entities)
Feature CTP Walkthrough: POCO Templates for Entity Framework (Explains how to use POCO Templates, that is a kind of T4 Template in order to generate POCO entities)
Feature CTP Walkthrough: Code Only for Entity Framework (Explains how to Entity Framework without any model like EDMX, just code)

I hope you enjoy the reading.

Microsoft Releases Roadmap

NunoGodinho — Wed, 03 Jun 2009 22:12:16 GMT

A lot is being announced this days regarding Microsoft Products and Technologies, and so this is a little summary of all those information's.

MIX09 – Keynote 1

NunoGodinho — Fri, 20 Mar 2009 20:26:21 GMT

Scott Guthrie on Advances in the Design Experiences

- Web

- powerful set of tools and technologies

- Expression Web 3

- Standard based web authoring

- Multi-language targeting

Erik Saltwell (Group Program Manager) about Expression Web 3.0

- Preview Feature that allows us to test the same design against several browsers and versions, and look at what are the differences

Announcement - Super Preview: IE 6,7,8 Beta Available Today also with a free version

Announcement - ASP.NET MVC 1.0 Already available for download

ASP.NET 4.0 and VS2010

- Improvements

- WebForms

- MVC

- AJAX

- Distributed Cache (Velocity)

- Visual Studio 2010

- Distribution

- Database deployment support

- Several versions of configuration files without tricks

Web Server Extension (all for free)

- IIS Database Manager

- New FTP Server with Security

- Request Routing

Microsoft Web Platform Installer

- Version 2.0 will be release this week

- Install latest versions of Microsoft Web Platform tools, server, database and so on

- Free download in www.microsoft.com/web

Windows Web App Gallery

- Allows us to find free web applications both in ASP.NET and PHP

- www.microsoft.com/web/gallery

- View, Review and Install the applications via Windows Platform Installer, possible to every known browser like, IE, Firefox, Chrome, Safari and so on.

- Customization of the install is possible inside the Web PI (Web Platform Installer)

Commerce Server 2009 (Available Now)

Azure Services Platform

- Preview launched in October last year

- User-demand driving new features

- Windows Azure: FastCGI/PHP and .Net full trust

- SQL Data Services: Relational Database

- .NET Services: More Web Standards

- On track for a commercial releases this year

BizSpark

Silverlight 3.0

- Netflix sample

- Media

- GPU hardware accelarated

- New codec support H.264, AAC, MPeg-4

- Raw bitstream Audio/Video API

- Improved logging

- IIS Media Services

- On-demand smooth streaming – with VC1 and H.264

- Live smooth streaming – Take software or hardware encoders that get live feeds and stream it on the network

- Edge Caching

- Web playlists

- Bit-rare throttling

- Advanced Logging

- Graphics

- GPU Acceleration and hardware composition

- Perspective 3D

- Bitmap & pixel API

- Pixel Shader effects

- Deep Zoom Improvements

- Application Development

- Deep linking, navigation and SEO

- Improved text quality

- Multi-touch support

- 100+ controls available

- Library caching support – Similar to GAC

- Design Workflow

- Expression Blend 3

- Sketch Flow – prototyping applications

- Adobe Photoshop and Illustrator imports

- File remain editable

- Behaviors

- Design with Data

- Source code Control support

- XAML, C# and VB.NET Support inside

- Data

- Data-binding improvements like element to element binding

- Validation Error Templates

- Server data push improvements making it possible for the server to notify the SL for changes being made on data used by the application

Announcement SAP NetWeaver support

Silverlight Outside the Browser

- Scenarios

- Both for Windows and Mac

- Extend Media Experiences

- Companion applications for your web site

- Capabilities

- Simple consumer friendly experience

- Safe, Secure, still sandboxed environment

- built-in auto-update support

- Built offline-aware applications

- An event is fired when the network change status

- Integrate with underlying operating System

Silverlight Download Size

- Thousands of new API

- Hundreds of new features

- New codecs

- Out of browser support

- Smaller 40k as SL2

Available Today

- SL 3 Beta

- Expression Blend 3

- SL3 Tools for VS2008

- IIS Media Services