Thank you so much – the text is showing up, but the checkbox entries are not showing up (all unchecked).
Are the parameters correct for the CheckListBox object?
<xctk:CheckListBox x:Name="lbMatlList"
Height="250"
Width="400"
DisplayMemberPath="TheText"
ValueMemberPath="TheText"
SelectedMemberPath="IsSelected"
SelectedValue="{Binding TheText}"
Delimiter="|"
SelectedItemsOverride="{Binding IsSelected}" >
</xctk:CheckListBox>