Is there any meaningful use where the Paragraph.Parent property is not a FlowDocument?

Question

In a FlowDocument / WPF RichtTextBox the Parent property is of type DependencyObject . But I haven't found any meaningful case where Parent isn't a FlowDocument (or null ).

Is there any?

Edit:

Why I need to know that?

My method gets a Paragraph as parameter and I don't know when it is called.

When Parent is null I know that the Paragraph is not integrated in any structure.

When parent is FlowDocument , I have to take that in account for my operations.

Do I have also take in account that it may be different from null or FlowDocument ?

Answer 1

Documentation for Paragraph clearly says:

Parent - Gets the parent in the logical tree for this element. ( Inherited from FrameworkContentElement )

So it is inherited property, which is bound to have common base type and for Paragraph in reasonable cases will contain FlowDocument object.

---

Paragraph.Parent is not necessary FlowDocument. In the example from FlowDocument Table official tutorial , the Parent of new Paragraph(new Run("2004 Sales Project")) paragraph is a TableCell :

// Create and add an empty TableRowGroup to hold the table's Rows.
table1.RowGroups.Add(new TableRowGroup());

// Add the first (title) row.
table1.RowGroups[0].Rows.Add(new TableRow());

// Alias the current working row for easy reference.
TableRow currentRow = table1.RowGroups[0].Rows[0];

// Global formatting for the title row.
currentRow.Background = Brushes.Silver;
currentRow.FontSize = 40;
currentRow.FontWeight = System.Windows.FontWeights.Bold;

// Add the header row with content, 
currentRow.Cells.Add(new TableCell(new Paragraph(new Run("2004 Sales Project"))));
// and set the row to span all 6 columns.
currentRow.Cells[0].ColumnSpan = 6;