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In my article Silverlight MVVM File Manager, I showed how a designer could use the MVVM pattern to create a UI from scratch, without writing a line of code.

For my presentation I put together an application that highlights some of the coolest web services features available in Silverlight 4 Beta. The app is intended to be used by travel agents and helps with their day-to-day work: it displays (fake) real-time price information for flight tickets, it can pull up real-time information about the status of a flight, it supports a chat feature so travel agents can talk to each other, and it supports sharing a set of tasks from Sharepoint.

This time around I’m talking about Silverlight (including a full-day workshop), the new Microsoft Ajax Library script loader and template features and RIA Services.

The project wants to help developers add validation support to ADO.NET Data Services as well as Web Services in Silverlight. In addition, it has the goal of allowing multiple ways to supply the validation metadata to the different data access strategies. As it is my opinion that there are scenarios where attributes are not the best idea.

So the first step in doing this is to add a new Web Application project to the solution I am working on. So the solution now contains one Class Library project and one Web Application. To the Web Application project, I add a WCF service called TwitterService. Just remember that the WCF service must be Silverlight enabled. So choose the “Silverlight-enabled WCF Service project”. Otherwise it will not be possible to call it from a Silverlight client.

Yavor Georgiev is talking about web service faults with the new SL3 client HTTP stack.

Carlos, one of our team members, has posted an quick blog post on how to use SOAP faults with the new client HTTP stack, introduced in SL3. This makes configuring faults significantly easier: there is no need to write custom code in your WCF service, and all you need to do is add one line of code to the Silverlight client.

From the EntitySpaces team they announce the EntitySpaces 2009.1.0629.0 alpha release. In the post you'll find the release notes along with some breaking changes.

We are pleased to make this new release available to current customers, there is no trial version available at this point. This release provides our DynamicQuery API built into the Client Side Proxy Stubs. The new serializable DynamicQuery’s should be Silverlight compliant as well. This release is for those who are using WebServices, Silverlight, or WCF and would like to explore our new DynamicQuery serialization feature. We will be making the source code available for our source code customers for this Alpha release as well.