WPF(001):Control.Dock以死，请用DockPanel.

<DockPanel xmlns="http://schemas.microsoft.com/2003/xaml">

  <Border Background="LightBlue" DockPanel.Dock="Top">

    <Text FontSize="14" FontStyle="italic">This is Header</Text>

  </Border>

  <Border DockPanel.Dock="Bottom" Background="LightYellow">

    <Text FontSize="14" FontStyle="italic">This is Footer</Text>

  </Border>

  <Border DockPanel.Dock="Left" Background="#D6C8CC">

    <DockPanel>

      <Text Margin="5" DockPanel.Dock="Top" FontSize="20">Best Sites</Text>

      <HyperLink Margin="5" DockPanel.Dock="Top" NavigateUri="http://blog.joycode.com">

        Visit blog.joycode.com

      </HyperLink>

      <HyperLink Margin="5" DockPanel.Dock="Top" NavigateUri="http://msdn.microsoft.com">

        Visit msdn.microsoft.com

      </HyperLink>

    </DockPanel>

  </Border>

  <Border DockPanel.Dock="Fill">

    <DockPanel>

      <FlowPanel DockPanel.Dock="Top">

        <Button Height="20px" Width="80px" Margin="5,5,10,10">Sign In</Button>

        <Button Height="20px" Width="90px" Margin="5,5,10,10">Sign Out</Button>

      </FlowPanel> 

      <Border DockPanel.Dock="Fill" Background="LightGreen">

        <DockPanel>

          <Text DockPanel.Dock="Top" Margin="0,10,0,15" FontSize="15">Please read the poem below and answer questions:</Text>

          <TextPanel FontSize="14" Background="LightGreen" Foreground="Blue">

           Dock Sample

          </TextPanel>              

        </DockPanel>

      </Border>

    </DockPanel>

  </Border>

</DockPanel>