How to achieve inset shadow effect in WPF

Question

I have designed an interface in HTML and wish to translate this into WPF but am having troubles with inset shadow.

box-shadow: inset 0 2px 7px 0 rgba(0, 0, 0, 0.5);

The effect im looking for is here in this jsFiddle, how can I translate this into WPF exactly?

Update

What I currently have based on Richards answer is below, its still not showing a shadow though?

<Border Grid.Row="1" CornerRadius="3" Grid.Column="0"  Margin="13,0,12,0" BorderThickness="0"  BorderBrush="#d2d2d2" ClipToBounds="True" Background="#fff0f0f0" >
    <Border Background="Transparent" BorderBrush="Black"  CornerRadius="3" BorderThickness="0" Margin="0">
        <Border.Effect>
            <DropShadowEffect ShadowDepth="2" BlurRadius="7" Color="Black" Direction="270" Opacity="0.5"/>
        </Border.Effect>
    </Border>
</Border>

Answer 1

You could try something like this, tweaking the thicknesses accordingly:

<Border Background="LightGray" BorderBrush="DarkGray" 
           BorderThickness="1" ClipToBounds="True">
  <Border Background="Transparent" BorderBrush="Black" 
              BorderThickness="0 2 7 0" Margin="-2">
    <Border.Effect>
      <DropShadowEffect ShadowDepth="0" BlurRadius="10"/>
    </Border.Effect>
  </Border>
</Border>