<Grid

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

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

<Grid.Resources>

<ResourceDictionary>

<Grid x:Key="A"/>

</ResourceDictionary>

</Grid.Resources>

<Border>

<StackPanel>

<ContentControl Grid.Row="2" Content="{DynamicResource A}" />

<ContentControl Grid.Row="2" Content="{DynamicResource A}" />

</StackPanel>

</Border>

</Grid>