<esri:MapProgressBar x:Name="MyProgressBar"
Background="{StaticResource CommonBackgroundBrush}"
Map="{Binding ElementName=Map}"
HorizontalAlignment="Center" VerticalAlignment="Bottom"
Width="150" Height="12"
Margin="5" />
xmlns:esri="http://schemas.esri.com/arcgis/client/2009"
<esri:MapProgressBar x:Name="MyProgressBar"
Map="{Binding ElementName=myMap}"
Grid.Row="1"
HorizontalAlignment="Center" VerticalAlignment="Center"
Width="150" Height="12"
Margin="5" />