Please find the following topic pages so you can learn everything you need to know to create great apps and games for Windows Phone:

Silverlight for Windows Phone

XNA Game Studio and XNA Framework

Windows Phone Developer Tools and Device Unlock

User Experience and User Interface

Application and Execution Model

Input, Touch and Gestures

Launchers and Choosers

Security

Frame and Page Navigation

Isolated Storage

Performance

Advertising Services

Camera and Photos

Media – Audio and Video

Push Notifications and Live Tiles

App Bar and Controls

Location and Mapping

Networking and Web Services

Sensors

Globalization and Localization

Porting Your App or Game to Windows Phone 7

Application Publishing and Marketplace

Happy troubleshooting…

The Windows Phone 7 Developer Tools package includes everything you need to write awesome applications and games for Windows Phone 7.  All of the tools included in it are absolutely free. But make sure that you’ll need to uninstall the beta version before installing the RTW version.

The Windows Phone Developer Tools includes the following:

• Visual Studio 2010 Express for Windows Phone – Free Edition of Visual Studio 2010 for development
• Windows Phone Emulator Resources – Hardware accelerated emulator to run and debug your apps without requiring WP7 device
• Silverlight 4 Tools For Visual Studio – for building great applications for WP7
• XNA Game Studio 4.0 – to build great 2D and 3D games for WP7
• Microsoft Expression Blend for Windows Phone – Free version of Blend for Windows Phone 7 development
• Phone Registration Tool – When you get a device, this allows you to “unlock” the device so you can run/debug your application on it, using your Marketplace account.

So why don’t you wait? You can download it from https://www.microsoft.com/downloads/en/details.aspx?FamilyID=04704acf-a63a-4f97-952c-8b51b34b00ce.

The best part is all of the above tools and frameworks are packaged into one setup.  If you already have Visual Studio 2010, the setup will also add support for Windows Phone 7 development and projects to your full Visual Studio 2010.

Also applications and games you build with the tools released today can be uploaded to the Windows Phone Marketplace - which enables any phone consumer to easily download and purchase them directly from their phone.  This provides a great way to distribute applications/games that you either get paid for or distribute for free. Install the above developer tools, try building new WP7 apps and don’t forget to keep them in Windows Phone Marketplace.

Nice way to start building WP7 apps!!

Here is a quick glimse of what we will be discussing in the comming year...

Demos of 5 apps coming to Windows Phone 7. I need ‘em….now

Netflix
Twitter
Flixster
OpenTable
Travelocity

I noticed that after copying and pasting a Style Setter, then editing that Setter’s Property and Value, the XAML Editor displays an invalid error message. Also the error message is not be cleared and refreshed by the XAML Editor.

This problem was corrected and fix was available part of Silverlight 4 tools release. You can download it from Microsoft Silverlight 4 Tools for Visual Studio 2010 and also mentioned in the knowledgebase article (https://support.microsoft.com/kb/2282880).

Microsoft recommends that all Silverlight and WPF developers download and install the Silverlight 4 tools. Additionally the above error condition can be cleared by rebuilding the project if the latest Silverlight 4 tools has not yet been installed!!

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You can download it from @ https://www.microsoft.com/downloads/en/details.aspx?FamilyID=369B20F7-9D30-4CFF-8A1B-F80901B2DA93

It includes the following:

• Visual Studio 2010 Express for Windows Phone Beta
• Windows Phone Emulator Beta
• Silverlight for Windows Phone Beta
• Microsoft Expression Blend for Windows Phone Beta
• XNA Game Studio 4.0 Beta

Fans around the world are celebrating today’s release of “Halo: Reach,” the newest installment of the popular sci-fi video game series made exclusively for Xbox. Halo creators say the game is the franchise’s biggest and most ambitious to date.

“Halo: Reach” is the fourth installment of the Halo franchise, but is a prequel to the first “Halo.” The newest game takes players to Reach, a sister planet to Earth, in the year 2552 just before a frightening surprise attack by a group of ruthless, terrifying alien invaders called the Covenant.

Millions of fans worldwide are celebrating today’s release of “Halo: Reach,” the newest installment in the Xbox 360 sci-fi saga. Many fans attended launch parties held around the world on Monday, including in London, New York City’s Times Square, and Seattle.

Others lined up outside their local video game retailer to buy the newest installment of Halo at midnight. Still others stocked up on Halo-themed Mountain Dew and Doritos, preparing to hunker down and devote some serious hours to the new game.

In 2007, Halo 3 shattered records as the biggest-ever entertainment launch, and “Halo: Reach” is on track to also be one of the largest game releases in history. More than 2.7 million people played the public multiplayer beta of “Halo: Reach.”

To promote the new game, Xbox released live-action Web movies leading up to the launch that depicted the lives of everyday citizens on the planet Reach before the invasion, once again stirring up murmurs about a possible Halo movie…

Windows Phone 7 Jump Start (Session 1 of 12): Introduction

A quick tour of Windows Phone 7 and how you write programs for it. We take a look at the platform capabilities and the software development options. We also offer you a chance to win a prize that is almost certainly not a private jet.

Windows Phone 7 Jump Start (Session 2 of 12): Building a Silverlight Application, Part 1

Building an application from scratch. How you can take a simple idea for a program and build the user interface, followed by the program behaviours that sit behind it. We take a look at data binding on Windows Phone and how best to structure your application to make best use of it.

Windows Phone 7 Jump Start (Session 3 of 12): Building a Silverlight Application, Part 2

Making more complex applications. You also get an overview of how the built in controls work, and how to tailor the user input to match your requirements. We also take a look at page navigation within a multi-form Silverlight application on the phone and how to use the navigation inputs for best effect.

Windows Phone 7 Jump Start (Session 4 of 12): Building Games for the Windows Phone 7 Platform

Using Silverlight as a platform for game creation. We show how to get a draw/update behavior into your Silverlight games and give you a fully worked game to chew on. We also illustrate how a Silverlight game can leverage the XNA libraries to add sound effects to a game.

Windows Phone 7 Jump Start (Session 5 of 12): Building XNA Games for the Windows Phone 7 Platform, Part 1

Getting Started with  XNA on Windows Phone. We talk about what makes the Windows Phone such a good platform for XNA development and how you create XNA games for it. We take a look at how games can manage the orientation of a phone and give you some tips on getting the best performance. Then we move on to take a look at the accelerometer input and how to make games that use this.

Windows Phone 7 Jump Start (Session 6 of 12): Building XNA Games for the Windows Phone 7 Platform, Part 2

Using the Windows Phone platform features in your XNA games. We continue with our look at Windows Phone features that make the platform so interesting to game developers. We cover the use of the touch screen, sound creation and finally give you some coverage of how to access the Zune media content in the device. Then we round off with a little look at how you can get text input from users by means of the Guide support in XNA.

Windows Phone 7 Jump Start (Session 7 of 12): Advanced Application Development, Part 1

Application Lifecycle. A look at the execution model on the phone, and how to create solutions that give a great user experience in the face of phone calls, termination and even total shutdown of the device itself. We show how to respond to messages to make your application give the appearance of being "always on" and the data persistence facilities that you will need to make this work.

Windows Phone 7 Jump Start (Session 8 of 12): Advanced Application Development, Part 2

Launchers and Choosers plus Using Isolated Storage. In this session we take a look at "Launchers and Choosers", how your application can use the built in phone behaviors to place calls, take pictures and select contacts, making it part of how the phone works. We also show how your application can store data in its own isolated storage on the phone device.

Windows Phone 7 Jump Start (Session 9 of 12): Advanced Application Development, Part 3

Storing Data and Using the Network. In this session we look at the connectedness of Windows Phone and how you can make this work for you. We demonstrate connected applications and how the notification service is used to allow external systems to give your application a wake-up call.

Windows Phone 7 Jump Start (Session 10 of 12): Marketing Your Windows Phone 7 Application

Using Windows Marketplace. In this session we explain how to join the Marketplace and get your applications out there. We take a look at how your solutions are packaged and deployed and how you go about registering a device for development and then using that with Visual Studio 2010 to test your applications.

Windows Phone 7 Jump Start (Session 11 of 12): Working with Media

Using XNA in 3D and with Media. In this session we take a quick look at how the Windows Phone works as an excellent platform for 3D games in XNA. We also explore how an XNA game can make use of the media stored in the phone, including photographs taken by the user and media loaded onto it from Zune.

Windows Phone 7 Jump Start (Session 12 of 12): Final Silverlight Topics and Wrap-Up

Taking Silverlight to the max. We start with a look at the Application bar, a crucial component in Windows Phone applications. We then move on to the Expression Blend tool, and how to create compelling user experiences with it. Finally we round off the session by showing how easy it is to use the map services in your phone and demonstrate some of the really cool navigation tools that are coming.

Bonus:
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* If you’re a Zune user, here's a link to the Zune subscription link. 
* Also a link to the iTunes subscription.

… watch out this space…i will keep you posted more on this…