SymbolStylesFromWebStyles.xaml

<UserControl x:Class="ArcGIS.WinUI.Samples.SymbolStylesFromWebStyles.SymbolStylesFromWebStyles"
             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" ViewpointChanged="MapViewExtentChanged" />
        <StackPanel Width="170"
                    Height="440"
                    Margin="5"
                    HorizontalAlignment="Left"
                    VerticalAlignment="Top"
                    Background="White">
            <TextBlock Margin="5,5,0,0"
                       FontSize="16"
                       FontWeight="Bold"
                       Text="Legend" />
            <ItemsControl x:Name="LegendItemsControl" Margin="10">
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <Grid Margin="5">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="25" />
                                <ColumnDefinition Width="auto" />
                            </Grid.ColumnDefinitions>
                            <Image Grid.Column="0"
                                   Margin="0,0,3,0"
                                   Source="{Binding ImageSource}" />
                            <TextBlock Grid.Column="1" Text="{Binding Name}" />
                        </Grid>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>
        </StackPanel>
    </Grid>
</UserControl>