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This is how you can serialize the List<WebDeveloper> collection to isolated storage. Using serialization with isolated storage is an easy way to save a collection of objects to a special permanent storage area on the client. XmlSerializer ser = new XmlSerializer(typeof(List<WebDeveloper>)); using (IsolatedStorageFile rootStore = IsolatedStorageFile.GetUserStoreForApplication()) { using (IsolatedStorageFileStream fs = new IsolatedStorageFileStream("WebDevelopers.xml", FileMode.Create, rootStore)) { ser.Serialize(fs, WebDevelopers); } } After serializing the list to isolated storage, you can verify that the file is created and even view its contents. When you want to turn the file within isolated storage back into objects, you follow a similar pattern, but invoke Deserialize. List< WebDeveloper > wds = new List< WebDeveloper >(); XmlSerializer ser = new XmlSerializer(typeof(List< WebDeveloper >)); using (IsolatedStorageFile rootStore = IsolatedStorageFile.GetUserStoreForApplication()) { using (IsolatedStorageFileStream fs = new IsolatedStorageFileStream("WebDevelopers.xml", FileMode.Open, rootStore)) { wds = (List< WebDeveloper>)ser.Deserialize(fs); } } Serialization is by far the easiest way to save business objects to XML files and load them from sources such as isolated storage, or download them via the Web using a class like WebClient.

This overload is obviously not complex. It simply ensures that the child object takes a snapshot of its own state only when the parent is not using data binding. The idea is to provide the behaviors required by data binding and the behaviors for manual invocation, as I discussed earlier in the chapter. You might wonder why the parent even tries to cascade the call to the child if BindingEdit is True. The reason is that it is the child object s decision whether it should take a snapshot of its state. This approach preserves encapsulation by letting the child object determine its own behavior. Some child objects, such as a BusinessBase child, will ignore the call. But other child objects such as FieldDataManager always take a snapshot of their state. In the case of FieldDataManager this is important, because it contains field values that are directly part of the containing object, so it isn t really a child in the same sense as an editable child that inherits from BusinessBase. Later in this chapter you ll see that the methods to undo or accept any changes will work the same way that is, they ll cascade the calls to any child objects. This way, all objects handle undo without breaking encapsulation.

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When you are viewing a note, you have four options, shown as soft keys along the bottom of each note. Tap the Refresh icon at the left end of the soft keys to make sure you have the most up-to-date version of this note from the server. To delete the note, tap the Trash Can icon.

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