<esri:FeatureLayer.MapTip> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <ItemsControl ItemsSource="{Binding Keys}" Grid.Column="0" /> <ItemsControl ItemsSource="{Binding Values}" Grid.Column="1" /> </Grid> </esri:FeatureLayer.MapTip>