WPF Diagram Designer - Part 3

<ResourceDictionary 
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >

  <ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="Shared.xaml" />
  </ResourceDictionary.MergedDictionaries>

  <!-- SimpleStyles: ToolTip -->
  <Style x:Key="{x:Type ToolTip}" TargetType="ToolTip">
    <Setter Property="OverridesDefaultStyle" Value="true"/>
    <Setter Property="HasDropShadow" Value="True"/>
    <Setter Property="Template">
      <Setter.Value>
        <ControlTemplate TargetType="ToolTip">
          <Border Name="Border"
            Background="{StaticResource LightBrush}"
            BorderBrush="{StaticResource SolidBorderBrush}"
            BorderThickness="1"
            Width="{TemplateBinding Width}"
            Height="{TemplateBinding Height}">
            <ContentPresenter
              Margin="4" 
              HorizontalAlignment="Left"
              VerticalAlignment="Top" />
          </Border>
          <ControlTemplate.Triggers>
            <Trigger Property="HasDropShadow" Value="true">
              <Setter TargetName="Border" Property="CornerRadius" Value="4"/>
              <Setter TargetName="Border" Property="SnapsToDevicePixels" Value="true"/>
            </Trigger>
          </ControlTemplate.Triggers>
        </ControlTemplate>
      </Setter.Value>
    </Setter>
  </Style>

</ResourceDictionary>