These are the higlights of this release:

• Automatic memory management for UIAlertView and UIActionSheet.
• CoreData API (MonoTouch.CoreData).
• New Foundation types: - MonoTouch.Foundation.NSExpression (for CoreData).
• Implicit conversions from integral data types to NSNumber.
• Explicit conversions to extract values from an NSNumber.
• Indexers for NSStrings

Previously, when you created UIAlertView objects or UIActionSheet objects, you needed to keep a reference to the object in a field or some structure to prevent the instances from being garbage collected. For example, this code could randomly fail depending on whether the Garbage Collector ran or not:

view plainprint?
var a = new UIActionSheet (...);  
a.Clicked += delegate {... }

In the above example, since the variable is a local variable (a is no longer referenced when the function terminates) the Garbage Collector could release the value of "a" before the user gets a chance to interact with the view.

With this release, when you use C# events to configure your UIActionSheet or UIAlertView, the runtime will automatically keep a reference to the object and release it when the view is dimissed.

The CoreData APIs came from the contributions done to MonoMac from the Mono-OSX community and are now included with MonoTouch as well. These provide access to the Objective-C APIs that support CoreData.