Public ReadOnly Property Items As ObservableCollection(Of IAttribution)

public ObservableCollection<IAttribution> Items {get;}

<Grid x:Name="LayoutRoot">
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="65" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="626" 
             TextWrapping="Wrap" Margin="2,2,0,0" 
             Text="By default three Layers have been added to the Map Control and the CopyrightText information
             for those Layers are displayed in the Attribution Control. Click the 'Interrogate Attribution.Items' 
             button to loop through the ObservableCollection(Of IAttribution) object obtained by the 
             Attribution.Items Property to display various information about items in the Control." />
  
  <!-- Add a Map Control zoomed to a specific Extent. -->
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="12,105,0,0" Name="Map1" 
            VerticalAlignment="Top" Height="303" Width="600" 
            Extent="-10723833,4627392,-10704398,4644168">
  
    <!-- 
    Add an ArcGISTiledMapServiceLayer. Note: since an ID value is specified the design-time will 
    list the Layer ID in Attribution Control placeholder (Ex: World Imagery attribution.).
    -->
    <esri:ArcGISTiledMapServiceLayer ID="World Imagery"
          Url="http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer"/>
      
    <!-- 
    Add an ArcGISDynamicMapServiceLayer. Note: since an ID value is specified the design-time will 
    list the Layer ID in Attribution Control placeholder (Ex: World Transportation attribution.).
    -->
    <esri:ArcGISDynamicMapServiceLayer ID="World Transportation"
          Url="http://server.arcgisonline.com/ArcGIS/rest/services/Reference/World_Transportation/MapServer" />
    
    <!-- 
    Add a FeatureLayer. Note: since an ID value is specified the design-time will 
    list the Layer ID in Attribution Control placeholder (Ex: Local Rivers attribution.).
    -->
    <esri:FeatureLayer ID="Local Rivers"
          Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Hydrography/Watershed173811/FeatureServer/1"
          AutoSave="False" DisableClientCaching="True" OutFields="*" Mode="OnDemand" />
    
  </esri:Map>
  
  <!--
  Add an Attribution Control and Bind the Map.Layers to the Attribution.Layers. Change a few
  visual appearance settings related to the Font for the text that is displayed in the Control. 
  -->
  <esri:Attribution HorizontalAlignment="Left" VerticalAlignment="Top" Margin="12,420,0,0" Name="Attribution1" 
                    Layers="{Binding ElementName=Map1,Path=Layers}" Width="600" Height="48" 
                    FontSize="12" FontFamily="Courier New" Foreground="Green" />
  
  <!-- 
  Add a button to dynamically interrogate each IAttribution object in the ObservableCollection using the 
  Attribution.Items Property. Note the Click event handler is wired up to use code-behind. 
  -->
  <Button Content="Interrogate Attribution.Items" Height="23" HorizontalAlignment="Left" 
          Margin="12,76,0,0" Name="Button_Interrogate_AttributeItems" 
          VerticalAlignment="Top" Width="600" Click="Button_Interrogate_AttributeItems_Click"/>
  
</Grid>

private void Button_Interrogate_AttributeItems_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // This function loops through all of the ObservabaleCollection<IAttribution> items of the Attribution
  // Control to display various information in a MessageBox.
  
  // Get the ObservabaleCollection<IAttribution> object.
  Collections.ObjectModel.ObservableCollection<ESRI.ArcGIS.Client.IAttribution> theObservableCollectionOfIAttribution = null;
  theObservableCollectionOfIAttribution = Attribution1.Items;
  
  // Get the count of the number of items in the ObservabaleCollection<IAttribution>.
  int theCount = theObservableCollectionOfIAttribution.Count;
  
  // Define a StringBuilder to display information back to the user about the Attribution Control.
  Text.StringBuilder myStringBuilder = new Text.StringBuilder();
  
  // Add the count of items to the StringBuilder.
  myStringBuilder.Append("There are " + theCount.ToString() + " Layers in the Attribution Control." + Environment.NewLine);
  
  // Loop through each item in the ObservabaleCollection<IAttribution>.
  foreach (ESRI.ArcGIS.Client.IAttribution oneIAttribution in theObservableCollectionOfIAttribution)
  {
    // Define some variables for CopyrightText and Layer.ID information.
    string theCopyrightText = null;
    string theLayerID = null;
    
    // FYI: The ESRI.ArcGIS.Client.IAttribution object are really various types of Layer objects!
    
    // Not every Type of Layer has a .AttributionTemplate Property which is the internal mechanism for 
    // constructing the ESRI.ArcGIS.Client.IAttribution object. Only those Layers which have a
    // .AttributionTemplate Property will get listed in the ObservabaleCollection<IAttribution> as 
    // a result of the Attribution.Items Property. Some of theses special Types of Layers that have a 
    // .AttributionTemplate Property are used below to obtain the various CopyrightText and Layer.ID 
    // information
    
    if (oneIAttribution is ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
    {
      ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer oneArcGISDynamicMapServiceLayer = null;
      oneArcGISDynamicMapServiceLayer = oneIAttribution as ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer;
      theCopyrightText = oneArcGISDynamicMapServiceLayer.CopyrightText;
      theLayerID = oneArcGISDynamicMapServiceLayer.ID;
    }
    else if (oneIAttribution is ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer)
    {
      ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer oneArcGISTiledMapServiceLayer = null;
      oneArcGISTiledMapServiceLayer = oneIAttribution as ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer;
      theCopyrightText = oneArcGISTiledMapServiceLayer.CopyrightText;
      theLayerID = oneArcGISTiledMapServiceLayer.ID;
    }
    else if (oneIAttribution is ESRI.ArcGIS.Client.FeatureLayer)
    {
      ESRI.ArcGIS.Client.FeatureLayer oneFeatureLayer = null;
      oneFeatureLayer = oneIAttribution as ESRI.ArcGIS.Client.FeatureLayer;
      ESRI.ArcGIS.Client.FeatureService.FeatureLayerInfo oneFeatureLayerInfo = oneFeatureLayer.LayerInfo;
      theCopyrightText = oneFeatureLayerInfo.CopyrightText;
      theLayerID = oneFeatureLayer.ID;
    }
    
    // Append the CopyrightText and Layer.ID information about the Layer in the StringBuilder.
    myStringBuilder.Append(Environment.NewLine);
    myStringBuilder.Append("Layer: " + theLayerID + " has the CopyrightText: " + theCopyrightText + Environment.NewLine);
  }
  
  // Display the information about the Attribute Control to the user. 
  MessageBox.Show(myStringBuilder.ToString());
}

Private Sub Button_Interrogate_AttributeItems_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
  
  ' This function loops through all of the ObservabaleCollection(Of IAttribution) items of the Attribution
  ' Control to display various information in a MessageBox.
  
  ' Get the ObservabaleCollection(Of IAttribution) object.
  Dim theObservableCollectionOfIAttribution As Collections.ObjectModel.ObservableCollection(Of ESRI.ArcGIS.Client.IAttribution)
  theObservableCollectionOfIAttribution = Attribution1.Items
  
  ' Get the count of the number of items in the ObservabaleCollection(Of IAttribution).
  Dim theCount As Integer = theObservableCollectionOfIAttribution.Count
  
  ' Define a StringBuilder to display information back to the user about the Attribution Control.
  Dim myStringBuilder As New Text.StringBuilder
  
  ' Add the count of items to the StringBuilder.
  myStringBuilder.Append("There are " + theCount.ToString + " Layers in the Attribution Control." + vbCrLf)
  
  ' Loop through each item in the ObservabaleCollection(Of IAttribution).
  For Each oneIAttribution As ESRI.ArcGIS.Client.IAttribution In theObservableCollectionOfIAttribution
    
    ' Define some variables for CopyrightText and Layer.ID information.
    Dim theCopyrightText As String = Nothing
    Dim theLayerID As String = Nothing
    
    ' FYI: The ESRI.ArcGIS.Client.IAttribution object are really various types of Layer objects!
    
    ' Not every Type of Layer has a .AttributionTemplate Property which is the internal mechanism for 
    ' constructing the ESRI.ArcGIS.Client.IAttribution object. Only those Layers which have a
    ' .AttributionTemplate Property will get listed in the ObservabaleCollection(Of IAttribution) as 
    ' a result of the Attribution.Items Property. Some of theses special Types of Layers that have a 
    ' .AttributionTemplate Property are used below to obtain the various CopyrightText and Layer.ID 
    ' information
    
    If TypeOf oneIAttribution Is ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer Then
      Dim oneArcGISDynamicMapServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer = Nothing
      oneArcGISDynamicMapServiceLayer = TryCast(oneIAttribution, ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
      theCopyrightText = oneArcGISDynamicMapServiceLayer.CopyrightText
      theLayerID = oneArcGISDynamicMapServiceLayer.ID
    ElseIf TypeOf oneIAttribution Is ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer Then
      Dim oneArcGISTiledMapServiceLayer As ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer = Nothing
      oneArcGISTiledMapServiceLayer = TryCast(oneIAttribution, ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer)
      theCopyrightText = oneArcGISTiledMapServiceLayer.CopyrightText
      theLayerID = oneArcGISTiledMapServiceLayer.ID
    ElseIf TypeOf oneIAttribution Is ESRI.ArcGIS.Client.FeatureLayer Then
      Dim oneFeatureLayer As ESRI.ArcGIS.Client.FeatureLayer = Nothing
      oneFeatureLayer = TryCast(oneIAttribution, ESRI.ArcGIS.Client.FeatureLayer)
      Dim oneFeatureLayerInfo As ESRI.ArcGIS.Client.FeatureService.FeatureLayerInfo = oneFeatureLayer.LayerInfo
      theCopyrightText = oneFeatureLayerInfo.CopyrightText
      theLayerID = oneFeatureLayer.ID
    End If
    
    ' Append the CopyrightText and Layer.ID information about the Layer in the StringBuilder.
    myStringBuilder.Append(vbCrLf)
    myStringBuilder.Append("Layer: " + theLayerID + " has the CopyrightText: " + theCopyrightText + vbCrLf)
    
  Next
  
  ' Display the information about the Attribute Control to the user. 
  MessageBox.Show(myStringBuilder.ToString)
  
End Sub