Question

I have a user control that should serve as container and it looks like following:

<ContentControl ... >
    <Grid>
        <Rectangle RadiusX="8" RadiusY="8">
            <Rectangle.Fill>
...
            </Rectangle.Fill>
        </Rectangle>

...

        <ContentPresenter />
    </Grid>
</ContentControl>

When I use it in a window, the contents of controls are replaced instead of put into ContentPresenter:

<XWpf2:MyContainer Margin="40">
        <ListView Margin="16" />
</XWpf2:MyContainer>

What is the right approach, what is wrong here?

Answer 1

You set the Content to a Grid, then you overwrite the Content with a ListView. If you want that structure to be preserved you need to assign it as the ContentControl.Template.

Of course the same thing can be said about the MyContainer if it is a UserControl, if you set the Content and then overwrite it with a ListView your whole ContentControl will be gone as well.