<esri:GraphicsLayer ID="AtlasPoints" >
<esri:GraphicsLayer.MapTip>
<Grid x:Name="tipGrid" IsHitTestVisible="True" x:Uid="tooltipGrid" esri:GraphicsLayer.MapTipHideDelay="00:00:0.4" >
<Border CornerRadius="2" BorderBrush="#FF222957"
BorderThickness="1" Background="LightYellow">
<TextBlock x:Name="MapItemToolTip" Margin="5" FontSize="10" Text="{Binding [MapItem].Name}" />
</Border>
</Grid>
</esri:GraphicsLayer.MapTip>
</esri:GraphicsLayer>