String.IsNullOrEmpty is a commonly used method for determining whether a string is null or has a zero length. But, no such method exists in the FCL for collections. A moment ago I whipped up an extension method for IEnumerable types. It’s not rocket science, but I thought I would post it anyway. public static class Extensions { /// <summary> /// Determines whether the collection is null or contains no elements. /// </summary> /// <typeparam name="T">The...

I arrived back in Geneva on Thursday night, after spending a couple of days in Belgium attending Techdays 10. I had a blast, and some of the highlights for me were: The presentation by my good friend Laurent Bugnion entitled A day in the life of a WPF/SL. Very cool. I had the opportunity to ask Anders Hejlsberg about the new .NET 4.0 default parameter feature. I attended a presentation on Moles. Looking forward to...

Get a head start with the new Windows Phone 7 developer tools. Learn how to create a Sokoban game in Silverlight for the WP7 platform. Read on…

MVP Valentin Billotte has written a very interesting article about using JavaScript to call web services in Silverlight with the ability to block until call completion on the UI thread.

This part focusses on the Calcium integration of the Task Model. This project is a Desktop and Silverlight user action management system, with undo, redo, and repeat. Allowing actions to be monitored, and grouped according to a context (such as a UI control), executed sequentially or in parallel, and even to be rolled back on failure. A ‘task’ is the term I use to describe application work units, instigated by the user or the system....