Public Shared ReadOnly LayersProperty As DependencyProperty

public static readonly DependencyProperty LayersProperty

<Grid x:Name="LayoutRoot" >
  
  <!-- Add a Map control. -->
  <esri:Map Background="White" HorizontalAlignment="Left" Name="Map1" VerticalAlignment="Top" 
            Height="232" Width="364" Margin="12,70,0,0"/>
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="40" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="618" TextWrapping="Wrap" Margin="2,9,0,0" 
             Text="Click the various buttons to see the effect of performing Binding in code-behind." />
  
  <!-- Create a few buttons to demonstrate an example of Binding in code-behind. -->
  <Button Content="Add a layer via binding" Height="23" HorizontalAlignment="Left" Margin="382,72,0,0" 
          Name="Button1" VerticalAlignment="Top" Width="246" Click="Button1_Click"/>
  <Button Content="Number of layers" Height="23" HorizontalAlignment="Left" Margin="382,101,0,0" 
          Name="Button2" VerticalAlignment="Top" Width="246" Click="Button2_Click"/>
  <Button Content="Set layer binding = Nothing/null" Height="23" HorizontalAlignment="Left" Margin="382,130,0,0" 
          Name="Button3" VerticalAlignment="Top" Width="246" Click="Button3_Click"/>
</Grid>

private void Button1_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // Create a new LayerCollection and add an ArcGISTiledMapServiceLayer to it.
  ESRI.ArcGIS.Client.LayerCollection myLayerCollection = new ESRI.ArcGIS.Client.LayerCollection();
  ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer myArcGISTiledMapServiceLayer = new ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer();
  myArcGISTiledMapServiceLayer.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer";
  myLayerCollection.Add(myArcGISTiledMapServiceLayer);
  
  // Assign the LayerCollection to the Button's Tag Property
  Button1.Tag = myLayerCollection;
  
  // Bind the Button1.Tag to Map1.Layers using the Map.LayersProperty Field
  System.Windows.Data.Binding myBinding = new System.Windows.Data.Binding("Tag");
  myBinding.ElementName = "Button1";
  Map1.SetBinding(ESRI.ArcGIS.Client.Map.LayersProperty, myBinding);
}
            
private void Button2_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // Try using this button after clicking Button1 and Button3 to see the different results.
  
  // Display the number of Layers in the Map in a MessageBox.
  ESRI.ArcGIS.Client.LayerCollection myLayerCollection = Map1.Layers;
  double myLayerCount = myLayerCollection.Count;
  MessageBox.Show("Number of Layers in the Map:" + myLayerCount.ToString());
}
  
private void Button3_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // Clear out all of the Layers in the LayerCollection which will automatically impact the
  // Map.Layers LayerCollection because they were bound together in the Button1 Click Event.
  ESRI.ArcGIS.Client.LayerCollection myLayerCollection = Button1.Tag;
  myLayerCollection.Clear();
}

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
  
  ' Create a new LayerCollection and add an ArcGISTiledMapServiceLayer to it.
  Dim myLayerCollection As New ESRI.ArcGIS.Client.LayerCollection
  Dim myArcGISTiledMapServiceLayer As New ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer
  myArcGISTiledMapServiceLayer.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"
  myLayerCollection.Add(myArcGISTiledMapServiceLayer)
  
  ' Assign the LayerCollection to the Button's Tag Property
  Button1.Tag = myLayerCollection
  
  ' Bind the Button1.Tag to Map1.Layers using the Map.LayersProperty Field
  Dim myBinding As System.Windows.Data.Binding = New System.Windows.Data.Binding("Tag")
  myBinding.ElementName = "Button1"
  Map1.SetBinding(ESRI.ArcGIS.Client.Map.LayersProperty, myBinding)
  
End Sub
  
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
  
  ' Try using this button after clicking Button1 and Button3 to see the different results.
  
  ' Display the number of Layers in the Map in a MessageBox.
  Dim myLayerCollection As ESRI.ArcGIS.Client.LayerCollection = Map1.Layers
  Dim myLayerCount As Double = myLayerCollection.Count
  MessageBox.Show("Number of Layers in the Map:" + myLayerCount.ToString)
  
End Sub
  
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
  
  ' Clear out all of the Layers in the LayerCollection which will automatically impact the
  ' Map.Layers LayerCollection because they were bound together in the Button1 Click Event.
  Dim myLayerCollection As ESRI.ArcGIS.Client.LayerCollection = Button1.Tag
  myLayerCollection.Clear()
  
End Sub