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    <p>As far as I understand your question, you can solve this by having <code>UC</code> expose a <code>SelectedSubView</code> (or whatever) property:</p> <pre><code>public object SelectedSubView { get; } </code></pre> <p>At the same time, you bind the radiobuttons to other properties of <code>UC</code> and update <code>SelectedSubView</code> accordingly (remember to implement INotifyPropertyChanged). Based on the selected radiobutton properties, the <code>SelectedSubView</code> must return the appropriate ViewModel.</p> <p>You then bind a <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.contentpresenter.aspx" rel="nofollow noreferrer">ContentPresenter</a> to the <code>SelectedSubView</code> property and use <strong>DataTemplates</strong> to select the correct user controls (uc1, uc2 or uc3) based on the type of the current <code>SelectedSubView</code>.</p> <hr> <p>Since you only want to hide inactive Views, it's probably best to keep their respective ViewModels around, so you may want to make them fields in the <code>UC</code> class</p> <pre><code>public class UC { private MyFirstViewModel vm1; private MySecondViewModel vm2; private MyThirdViewModel vm3; private object selectedVM; public object SelectedSubView { get { return this.selectedVM; } } // This method should be called whenever one of the radio buttons // are updated (from their bindings) private void UpdateSelectedView() { this.selectedVM = // pick from vm1, vm2, vm3 according to radio button // Remember to raise INotifyPropertyChanged for SelectedSubView } } </code></pre>
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    1. COThanks Mark for the reply.. Can you please give me an idea of returing a viewmodel or how to set the viewmodel at runtime?
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    2. CO@Ashish Ashu: Updated my answer.
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