Figure 2.
This snapshot is taken after expand items.
Here is HTML design of this:
<Expander Background="DarkGreen" x:Name="Expander1" Header="Expander1">
<StackPanel Background="Blue">
<Expander Background="Red" Header="Expander2">
<ListBox Background="Chocolate" Name="listbox11">
<ListBoxItem>
<TextBlock>raj beniwal</TextBlock>
</ListBoxItem>
<ListBoxItem Background="Blue">
<StackPanel Background="Yellow">
<TextBlock>dinesh kumar</TextBlock>
<Expander Background="Pink" Header="Expander3">
<ListBox Name="list2">
<ListBoxItem>
<TextBlock>rahul saxena</TextBlock>
</ListBoxItem>
<ListBoxItem>
<TextBlock>naresh kumar</TextBlock>
</ListBoxItem>
<ListBoxItem>
<TextBlock>suhel</TextBlock>
</ListBoxItem>
<ListBoxItem>
<TextBlock>steve</TextBlock>
</ListBoxItem>
<ListBoxItem>
<TextBlock>varman</TextBlock>
</ListBoxItem>
</ListBox>
</Expander>
</StackPanel>
</ListBoxItem>
</ListBox>
</Expander>
</StackPanel>
</Expander>
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