<Style TargetType="{x:Type local:ImGearMagnifierCtl} 
    <Setter Property="HorizontalAlignment" Value="Left"/>
    <Setter Property="VerticalAlignment" Value="Top"/>
    <Setter Property="Visibility" Value="Collapsed"/>
    <Setter Property="Template 
      <Setter.Value>
        <ControlTemplate TargetType="{x:Type local:ImGearMagnifierCtl} 
  <!a-Resources-->
          <ControlTemplate.Resources>
  <!a-Style for ellipse popup magnifier-->
            <Style TargetType="{x:Type local:ImGearMagnifierPopUpCtl}" 
x:Key="EllipseMagnifier 
              <Setter Property="HorizontalAlignment" Value="Left"/>
              <Setter Property="VerticalAlignment" Value="Top"/>
              <Setter Property="Template 
                <Setter.Value>
                  <ControlTemplate 
TargetType="{x:Type local:ImGearMagnifierPopUpCtl} 
                    <Grid>
                      <Path x:Name="Path" 
Width="{Binding ParentCtl.PopupWidth}" 
Height="{Binding ParentCtl.PopupHeight}"
Stretch="Fill" StrokeLineJoin="Round" 
Stroke="#55000000" Fill="#55000000" >
                        <Path.Data>
                          <EllipseGeometry x:Name="EllipseGeom" 
     Center="100,100" 
RadiusX="{Binding ParentCtl.PopupWidth}" RadiusY="{Binding ParentCtl.PopupHeight}"/>
                        </Path.Data>
                      </Path>
                      <StackPanel ClipToBounds="True 
                        <Image HorizontalAlignment="Center"  
Source="{Binding ParentCtl.MagnifiedImage} 
                          <Image.Clip>
                            <EllipseGeometry 
Center="{Binding Center}" 
RadiusX="{Binding ImageRadius.Width}" RadiusY="{Binding ImageRadius.Height}"/>
                          </Image.Clip>
                        </Image>
                      </StackPanel>
                    </Grid>
                  </ControlTemplate>
                </Setter.Value>
              </Setter>
            </Style>
          </ControlTemplate.Resources>
<!--Placeholder-->
          <Border Background="Indigo" CornerRadius="3 
            <Label>ImGearMagnifierCtl Control</Label>
          </Border>
        </ControlTemplate>
      </Setter.Value>
    </Setter>
  </Style>