Public Property OutSpatialReference As SpatialReference

public SpatialReference OutSpatialReference {get; set;}

<Grid x:Name="LayoutRoot" Background="White">
  
  <!--
  Manually change the Map.SpatialReference to WKID = 4269. Set the initial Map.Extent to be the area of 
  Maine for that SpatialReference.
  -->
  <esri:Map Background="LightGray" Margin="12,238,538,12" Name="map1" Height="250" Width="250" 
        HorizontalAlignment="Left" VerticalAlignment="Top">
    <esri:Map.Extent >
      <esri:Envelope XMin="-71.80" YMin="42.56" XMax="-66.47" YMax="47.89">
        <esri:Envelope.SpatialReference>
          <esri:SpatialReference WKID="4269"/>
        </esri:Envelope.SpatialReference>
      </esri:Envelope>
    </esri:Map.Extent>
  </esri:Map>
  
  <!--
  Manually change the Map.SpatialReference to WKID = 53030. Set the initial Map.Extent to be the area of 
  Maine for that SpatialReference.
  -->
  <esri:Map Background="LightBlue" Margin="276,238,274,12" Name="map2" Height="250" Width="250" 
        HorizontalAlignment="Left" VerticalAlignment="Top">
    <esri:Map.Extent >
      <esri:Envelope XMin="-8072381" YMin="5304258" XMax="-7314404" YMax="6062235">
        <esri:Envelope.SpatialReference>
          <esri:SpatialReference WKID="102100"/>
        </esri:Envelope.SpatialReference>
      </esri:Envelope>
    </esri:Map.Extent>
  </esri:Map>
  
  <!-- 
  Add buttons to perform the work showing how the changing the Query.OutSpatialReference can yield 
  different results. Both buttons call the same click event handler. 
  -->
  <Button Content="Query.OutSpatialReference = 4269" Height="23" HorizontalAlignment="Left" Margin="12,202,0,0" 
          Name="Button_WKID4269" VerticalAlignment="Top" Width="250" Click="Button_Click"/>
  <Button Content="Query.OutSpatialReference = 102100" Height="23" HorizontalAlignment="Left" Margin="276,202,0,0" 
          Name="Button_WKID102100" VerticalAlignment="Top" Width="250" Click="Button_Click"/>
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="138" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="590" 
   TextWrapping="Wrap" Text="Click the two buttons to see how changing the Query.OutSpatialReference yields different 
   results. The feature returned for the QueryTask is the state of Maine."/>
  
</Grid>

private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // This function will execute when the user clicks either of the two buttons. The purpose is to
  // demonstrate various ways that a Query.OutSpatialRefernce yields different projected geometries.
  
  // Create a new QueryTask object. Set the Url to be a sample public FeatureLayer.
  ESRI.ArcGIS.Client.Tasks.QueryTask myQueryTask = new ESRI.ArcGIS.Client.Tasks.QueryTask();
  myQueryTask.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5";
  
  // Wire up the event handler for when the QueryTask completes.
  myQueryTask.ExecuteCompleted += myQueryTask_ExecuteCompleted;
  
  // Create a new Query object. 
  ESRI.ArcGIS.Client.Tasks.Query myQuery = new ESRI.ArcGIS.Client.Tasks.Query();
  
  // Specify the ObjectID value for the State of Maine.
  myQuery.ObjectIDs = new int[]{3};
  
  // Return the Geometry to the QueryTask.ExecuteCompleted Event.
  myQuery.ReturnGeometry = true;
  
  // Get the button the user just clicked.
  Button theButton = (Button)sender;
  
  // Branch setting the Query.OutSpatialReference depending on which button the user clicked. Also pass the 
  // correct MapContol as the UserToken object to the QueryTask.Execute Method.  
  if (theButton.Name == "Button_WKID4269")
  {
    // Use Map1.
    myQuery.OutSpatialReference = map1.SpatialReference;
    myQueryTask.ExecuteAsync(myQuery, map1);
  }
  else if (theButton.Name == "Button_WKID102100")
  {
    // Use Map2.
    myQuery.OutSpatialReference = map2.SpatialReference;
    myQueryTask.ExecuteAsync(myQuery, map2);
  }
}
            
private void myQueryTask_ExecuteCompleted(object sender, ESRI.ArcGIS.Client.Tasks.QueryEventArgs e)
{
  // Get the returned FeatureSet from the QueryTask.
  ESRI.ArcGIS.Client.Tasks.FeatureSet myFeatureSet = e.FeatureSet;
  
  // Create a new GraphicsLayer and set its ID.
  ESRI.ArcGIS.Client.GraphicsLayer myGraphicsLayer = new ESRI.ArcGIS.Client.GraphicsLayer();
  myGraphicsLayer.ID = "TheGraphicsLayer";
  
  // Create a SimpleFillSymbol to draw the graphics features added to the GraphicsLayer. 
  ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol mySimpleFillSymbol = new ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol();
  System.Windows.Media.SolidColorBrush mySolidColorBrush = new System.Windows.Media.SolidColorBrush(Colors.Red);
  mySolidColorBrush.Opacity = 0.5;
  mySimpleFillSymbol.Fill = mySolidColorBrush;
  
  // Ensure the we have a FeatureSet with data.
  if (myFeatureSet != null && myFeatureSet.Features.Count > 0)
  {
  // Iterate over each feature (which is a Graphic object) in the FeatureSet.
  foreach (ESRI.ArcGIS.Client.Graphic graphicFeature in myFeatureSet.Features)
  {
    if (graphicFeature.Geometry is ESRI.ArcGIS.Client.Geometry.Polygon)
    {
      // The Graphic returned has geometry values. 
      
      // Attach the custom solid fill symbol to the Graphic.
      graphicFeature.Symbol = mySimpleFillSymbol as ESRI.ArcGIS.Client.Symbols.Symbol;
      
      // Add the Graphic to the GraphicsLayer
      myGraphicsLayer.Graphics.Add(graphicFeature);
    }
  }
  }
  // Get the Map Control from the UserState object.
  ESRI.ArcGIS.Client.Map theMapControl = (ESRI.ArcGIS.Client.Map) e.UserState;
  
  // Add the GraphicsLayer to the correct Map Control. It will automatically draw; there is not a need for a refresh.
  theMapControl.Layers.Add(myGraphicsLayer);
}

Private Sub Button_Click(sender As System.Object, e As System.Windows.RoutedEventArgs)
  
  ' This function will execute when the user clicks either of the two buttons. The purpose is to
  ' demonstrate various ways that a Query.OutSpatialReference yields different projected geometries.
  
  ' Create a new QueryTask object. Set the Url to be a sample public FeatureLayer.
  Dim myQueryTask As ESRI.ArcGIS.Client.Tasks.QueryTask = New ESRI.ArcGIS.Client.Tasks.QueryTask
  myQueryTask.Url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5"
  
  ' Wire up the event handler for when the QueryTask completes.
  AddHandler myQueryTask.ExecuteCompleted, AddressOf myQueryTask_ExecuteCompleted
  
  ' Create a new Query object. 
  Dim myQuery As ESRI.ArcGIS.Client.Tasks.Query = New ESRI.ArcGIS.Client.Tasks.Query
  
  ' Specify the ObjectID value for the State of Maine.
  myQuery.ObjectIDs = {3}
  
  ' Return the Geometry to the QueryTask.ExecuteCompleted Event.
  myQuery.ReturnGeometry = True
  
  ' Get the button the user just clicked.
  Dim theButton As Button = sender
  
  ' Branch setting the Query.OutSpatialReference depending on which button the user clicked. Also pass the 
  ' correct MapContol as the UserToken object to the QueryTask.Execute Method.  
  If theButton.Name = "Button_WKID4269" Then
    
    ' Use Map1.
    myQuery.OutSpatialReference = map1.SpatialReference
    myQueryTask.ExecuteAsync(myQuery, map1)
    
  ElseIf theButton.Name = "Button_WKID102100" Then
    
    ' Use Map2.
    myQuery.OutSpatialReference = map2.SpatialReference
    myQueryTask.ExecuteAsync(myQuery, map2)
    
  End If
  
End Sub
            
Private Sub myQueryTask_ExecuteCompleted(sender As Object, e As ESRI.ArcGIS.Client.Tasks.QueryEventArgs)
  
  ' Get the returned FeatureSet from the QueryTask.
  Dim myFeatureSet As ESRI.ArcGIS.Client.Tasks.FeatureSet = e.FeatureSet
  
  ' Create a new GraphicsLayer and set its ID.
  Dim myGraphicsLayer As ESRI.ArcGIS.Client.GraphicsLayer = New ESRI.ArcGIS.Client.GraphicsLayer
  myGraphicsLayer.ID = "TheGraphicsLayer"
  
  ' Create a SimpleFillSymbol to draw the graphics features added to the GraphicsLayer. 
  Dim mySimpleFillSymbol As New ESRI.ArcGIS.Client.Symbols.SimpleFillSymbol
  Dim mySolidColorBrush As New System.Windows.Media.SolidColorBrush(Colors.Red)
  mySolidColorBrush.Opacity = 0.5
  mySimpleFillSymbol.Fill = mySolidColorBrush
  
  ' Ensure the we have a FeatureSet with data.
  If myFeatureSet IsNot Nothing AndAlso myFeatureSet.Features.Count > 0 Then
    
    ' Iterate over each feature (which is a Graphic object) in the FeatureSet.
    For Each graphicFeature As ESRI.ArcGIS.Client.Graphic In myFeatureSet.Features
      
      If TypeOf graphicFeature.Geometry Is ESRI.ArcGIS.Client.Geometry.Polygon Then
        
        ' The Graphic returned has geometry values. 
         
        ' Attach the custom solid fill symbol to the Graphic.
        graphicFeature.Symbol = TryCast(mySimpleFillSymbol, ESRI.ArcGIS.Client.Symbols.Symbol)
        
        ' Add the Graphic to the GraphicsLayer
        myGraphicsLayer.Graphics.Add(graphicFeature)
        
      End If
      
    Next graphicFeature
    
  End If
  
  ' Get the Map Control from the UserState object.
  Dim theMapControl As ESRI.ArcGIS.Client.Map = e.UserState
  
  ' Add the GraphicsLayer to the correct Map Control. It will automatically draw; there is not a need for a refresh.
  theMapControl.Layers.Add(myGraphicsLayer)
  
End Sub