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    <p>I just tried this tonight:</p> <pre class="lang-cs prettyprint-override"><code>public class State { public string Code { get; set; } public string Name { get; set; } } public class MyWindowViewModel { ObservableCollection&lt;State&gt; _states = new ObservableCollection&lt;State&gt; { new State { Code = "FL", Name = "Florida" }, new State { Code = "CA", Name = "California" }, }; public ObservableCollection&lt;State&gt; States { get { return _states; } } } </code></pre> <pre class="lang-xml prettyprint-override"><code>&lt;Window x:Class="WpfApplication1.MyWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:app="clr-namespace:WpfApplication1" Title="Window1" Height="300" Width="300"&gt; &lt;Window.Resources&gt; &lt;app:ServiceLocator x:Key="Locator" /&gt; &lt;/Window.Resources&gt; &lt;StackPanel&gt; &lt;ComboBox x:Name="TestCombo" SelectedIndex="0" DisplayMemberPath="Name" SelectedValuePath="Code"&gt; &lt;ComboBox.ItemsSource&gt; &lt;CompositeCollection&gt; &lt;app:State Code="" Name="Select a state..." /&gt; &lt;app:State Code="TX" Name="Texas" /&gt; &lt;CollectionContainer Collection="{Binding Source={StaticResource Locator}, Path=MyWindowViewModel.States}" /&gt; &lt;/CompositeCollection&gt; &lt;/ComboBox.ItemsSource&gt; &lt;/ComboBox&gt; &lt;/StackPanel&gt; &lt;/Window&gt; </code></pre> <p>The key here is to create an instance of your service locator as a static resource then go through it to get to your viewmodel. The service locator can wire up to instances of the ViewModel using Unity or whatever DI you want.</p> <p>Edit:</p> <p>Actually in my silverlight app I create the service locator as a static resoure in the App.xaml and then bind my other UserControls/Windows/Pages DataContext to a ViewModel property of the service locator. It should still work the same way for the combo boxes though even if the service locator is instantiated in the App.xaml's resources. I wish there was a silverlight version of CompositeCollection that I could use. This would work great for the app I'm working on. :(</p>
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    1. USDavid Findley
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    1. COWe have been meaning to go this route based on some recent suggestions on Marlon Grech's blog. I'll try this in the morning!
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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