gistfile1.xml

        <ItemsControl Grid.IsSharedSizeScope="True">
            <ItemsControl.ItemTemplate>
                <DataTemplate DataType="HeaderedContentControl">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition SharedSizeGroup="Labels" />
                            <ColumnDefinition SharedSizeGroup="Inputs" />
                        </Grid.ColumnDefinitions>
                        <TextBlock Grid.Column="0" Text="{Binding Header}" />
                        <ContentControl Grid.Column="1" Content="{Binding Content}" />
                    </Grid>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
            <ItemsControl.Items>
                <HeaderedContentControl>
                    <HeaderedContentControl.Header>Label1</HeaderedContentControl.Header>
                    <HeaderedContentControl.Content>
                        <TextBlock Text="{Binding Name, Mode=TwoWay}" />
                    </HeaderedContentControl.Content>
                </HeaderedContentControl>
            </ItemsControl.Items>
        </ItemsControl>