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When a C1OutlookBar is collapsed, the central content region can display customized collapsed content. In Microsoft Outlook 2007-2010, this area is simply vertical text that reads "Navigation Pane". This region can be associated with a selected item for added flexibility, but this is not a requirement. There are two options for showing collapsed content.
Option A: Use the CollapsedContent property to display text when the C1OutlookBar is collapsed.
<c1:C1OutlookBar CollapsedContent = "Navigation Pane" />
Option B: Use the CollapsedContent property to display the same collasped content no matter which item is selected.
<c1:C1OutlookBar>
<c1:C1OutlookBar.CollapsedContent>
�c
</c1:C1OutlookBar.CollapsedContent>
</c1:C1OutlookBar>
For example, see the following XAML displays "Navigation Pane" vertically.
<c1:C1OutlookBar.CollapsedContent>
<c1:C1LayoutTransformer>
<c1:C1LayoutTransformer.LayoutTransform>
<RotateTransform Angle="270" />
</c1:C1LayoutTransformer.LayoutTransform>
<TextBlock FontSize="13" TextAlignment="Center" VerticalAlignment="Center"
Text="Navigation Pane" />
</c1:C1LayoutTransformer>
</c1:C1OutlookBar.CollapsedContent>