Public Class ScaleLine 
   Inherits System.Windows.Controls.Control

public class ScaleLine : System.Windows.Controls.Control 

<esri:ScaleLine Name="ScaleLine1" Map="{Binding ElementName=Map1}"
     HorizontalAlignment="Left" VerticalAlignment="Top"  
     TargetWidth="400" 
     Foreground="Black" FontFamily="Courier New" FontSize="18" />

//Create a new ScaleLine Control and add it to the LayoutRoot (a Grid in the XAML)
ESRI.ArcGIS.Client.Toolkit.ScaleLine ScaleLine1 = new ESRI.ArcGIS.Client.Toolkit.ScaleLine();
LayoutRoot.Children.Add(ScaleLine1);
             
//Associate the ScaleLine with Map Control (analagous to a OneTime Binding). Most common coding pattern.
ScaleLine1.Map = Map1;
             
//Alternative Binding Method. Useful if the ScaleLine's Properties will dynamically impact other objects.
//System.Windows.Data.Binding myBinding = new System.Windows.Data.Binding();
//myBinding.ElementName = "Map1";
//ScaleLine1.SetBinding(ESRI.ArcGIS.Client.Toolkit.ScaleLine.MapProperty, myBinding);
            
//Set the alignment properties relative the hosting Grid Control
ScaleLine1.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
ScaleLine1.VerticalAlignment = System.Windows.VerticalAlignment.Top;
             
//Set the Map units for the ScaleLine
ScaleLine1.MapUnit = ESRI.ArcGIS.Client.Toolkit.ScaleLine.ScaleLineUnit.DecimalDegrees;
             
//Set the target width for the ScaleLine
ScaleLine1.TargetWidth = 400;
             
//Set ScaleLine color and related Font information
System.Windows.Media.Color myScaleLineColor = Color.FromArgb(255, 0, 0, 0);
ScaleLine1.Foreground = new System.Windows.Media.SolidColorBrush(myScaleLineColor);
ScaleLine1.FontFamily = new FontFamily("Courier New");
ScaleLine1.FontSize = 18;

'Create a new ScaleLine Control and add it to the LayoutRoot (a Grid in the XAML)
   Dim ScaleLine1 As New ESRI.ArcGIS.Client.Toolkit.ScaleLine
   LayoutRoot.Children.Add(ScaleLine1)
             
   'Associate the ScaleLine with Map Control (analagous to a OneTime Binding). Most common coding pattern.
   ScaleLine1.Map = Map1
             
   'Alternative Binding Method. Useful if the ScaleLine's Properties will dynamically impact other objects.
   'Dim myBinding As System.Windows.Data.Binding = New System.Windows.Data.Binding()
   'myBinding.ElementName = "Map1"
   'ScaleLine1.SetBinding(ESRI.ArcGIS.Client.Toolkit.ScaleLine.MapProperty, myBinding)
            
   'Set the alignment properties relative the hosting Grid Control
   ScaleLine1.HorizontalAlignment = Windows.HorizontalAlignment.Left
   ScaleLine1.VerticalAlignment = Windows.VerticalAlignment.Top
             
   'Set the Map units for the ScaleLine
   ScaleLine1.MapUnit = ESRI.ArcGIS.Client.Toolkit.ScaleLine.ScaleLineUnit.DecimalDegrees
             
   'Set the target width for the ScaleLine
   ScaleLine1.TargetWidth = 400
             
   'Set ScaleLine color and related Font information
   Dim myScaleLineColor As System.Windows.Media.Color = Color.FromArgb(255, 0, 0, 0)
   ScaleLine1.Foreground = New System.Windows.Media.SolidColorBrush(myScaleLineColor)
   ScaleLine1.FontFamily = New FontFamily("Courier New")
   ScaleLine1.FontSize = 18

<Style x:Key="ScaleBarStyle" TargetType="esri:ScaleLine">
    <Setter Property="Background" Value="White" />
    <Setter Property="TargetWidth" Value="150.0" />
    <Setter Property="FontSize" Value="10.0" />
    <Setter Property="Foreground" Value="Black" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="esri:ScaleLine">
                <StackPanel Name="LayoutRoot" Orientation="Horizontal">
                    <Grid VerticalAlignment="Center" Height="10" Width="{Binding MetricSize, RelativeSource={RelativeSource TemplatedParent}}">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="1*" />
                            <ColumnDefinition Width="1*" />
                            <ColumnDefinition Width="1*" />
                            <ColumnDefinition Width="2*" />
                            <ColumnDefinition Width="5*" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="1*" />
                            <RowDefinition Height="1*" />
                        </Grid.RowDefinitions>
                        <Rectangle Fill="{TemplateBinding Foreground}" Grid.Row="0" Grid.Column="0" />
                        <Rectangle Fill="{TemplateBinding Background}" Grid.Row="0" Grid.Column="1" />
                        <Rectangle Fill="{TemplateBinding Foreground}" Grid.Row="0" Grid.Column="2" />
                        <Rectangle Fill="{TemplateBinding Background}" Grid.Row="0" Grid.Column="3" />
                        <Rectangle Fill="{TemplateBinding Foreground}" Grid.Row="0" Grid.Column="4" />
                        <Rectangle Fill="{TemplateBinding Background}" Grid.Row="1" Grid.Column="0" />
                        <Rectangle Fill="{TemplateBinding Foreground}" Grid.Row="1" Grid.Column="1" />
                        <Rectangle Fill="{TemplateBinding Background}" Grid.Row="1" Grid.Column="2" />
                        <Rectangle Fill="{TemplateBinding Foreground}" Grid.Row="1" Grid.Column="3" />
                        <Rectangle Fill="{TemplateBinding Background}" Grid.Row="1" Grid.Column="4" />
                    </Grid>
                    <TextBlock Text="{Binding MetricValue, RelativeSource={RelativeSource TemplatedParent}}" VerticalAlignment="Center" Margin="2,0"/>
                    <TextBlock Text="{Binding MetricUnit, RelativeSource={RelativeSource TemplatedParent}}" VerticalAlignment="Center" />
                </StackPanel>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>