ConvexHull.xaml

<UserControl x:Class="ArcGIS.WinUI.Samples.ConvexHull.ConvexHull"
             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 Style="{StaticResource BorderStyle}">
            <StackPanel>
                <TextBlock FontWeight="SemiBold"
                           Text="Tap on the map in at least three places, then click 'Create convex hull'."
                           TextWrapping="Wrap" />
                <Button x:Name="ConvexHullButton"
                        Margin="0,5,0,0"
                        HorizontalAlignment="Stretch"
                        Click="ConvexHullButton_Click"
                        Content="Create convex hull" />
                <Button x:Name="ResetButton"
                        Margin="0,5,0,0"
                        HorizontalAlignment="Stretch"
                        Click="ResetButton_Click"
                        Content="Reset" />
            </StackPanel>
        </Border>
    </Grid>
</UserControl>