Create Silverlight tabItems and add user controls to it dynamically.

gistfile1.cs

void PopulateDashBoard(object sender, EventArgs e)
{
	LoadOperation<UserSnapin> op = sender as LoadOperation<UserSnapin>;
	_entities = op.Entities;
	string currentPage = String.Empty;
	TabItem tabItem;
	Canvas tabCanvas = null;

	foreach (var UserSnapin in _entities)
	{
		// Add a page if needed
		if (currentPage != UserSnapin.Page)
		{
			currentPage = UserSnapin.Page;
			tabItem = new TabItem();
			tabItem.Header = UserSnapin.Page;
			tabItem.Content = new Canvas();
			tabCanvas = tabItem.Content as Canvas;
			Pages.Items.Add(tabItem);
		}

		Type snapInType = Assembly.GetExecutingAssembly()
			.GetType(UserSnapin.Snapin.Source);

		UIElement uc = (UIElement)Activator.CreateInstance(snapInType);

		Canvas.SetLeft(uc, UserSnapin.PositionLeft);
		Canvas.SetTop(uc, UserSnapin.PositionTop);

		uc.MouseLeftButtonDown += new MouseButtonEventHandler(Handle_MouseDown);
		uc.MouseMove += new MouseEventHandler(Handle_MouseMove);
		uc.MouseLeftButtonUp += new MouseButtonEventHandler(Handle_MouseUp);

		// Add the canvas to the tabCanvas of the page 
		tabCanvas.Children.Add(uc);
	}

}