MapRotation.xaml

<UserControl
    x:Class="ArcGISRuntime.UWP.Samples.MapRotation.MapRotation"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:esriUI="using:Esri.ArcGISRuntime.UI.Controls">
    <Grid>
        <esriUI:MapView x:Name="MyMapView" />
        <Border BorderBrush="Black" BorderThickness="1" Background="White"
                HorizontalAlignment="Right" VerticalAlignment="Top"
                Margin="30" Padding="20" Width="375">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="50" />
                </Grid.ColumnDefinitions>
                <Slider x:Name="MySlider"
                        Grid.Column="0"
                        Minimum="0" Maximum="180" Value="0"
                        ValueChanged="MySlider_ValueChanged" />
                <TextBlock x:Name="MyTextBlock"
                           Text="0°"
                           Margin="5,8,0,0"
                           TextAlignment="Center" FontWeight="SemiBold"
                           Grid.Column="1" />
            </Grid>
        </Border>
    </Grid>
</UserControl>