MainWindow.xaml

<Window x:Class="DisplayAMap.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:DisplayAMap"
        xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">

    <Window.Resources>
        <local:MapViewModel x:Key="MapViewModel" />
    </Window.Resources>

    <Grid>

        <esri:MapView x:Name="MainMapView"
                      Map="{Binding Map, Source={StaticResource MapViewModel}}" />

    </Grid>

</Window>