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RichTextBox.Document Property

Gets or sets the FlowDocument that represents the contents of the RichTextBox.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

public FlowDocument Document { get; set; }
  <FlowDocument .../>

Property Value

Type: System.Windows.Documents.FlowDocument
A FlowDocument object that represents the contents of the RichTextBox.
By default, this property is set to an empty FlowDocument. Specifically, the empty FlowDocument contains a single Paragraph, which contains a single Run which contains no text.


An attempt is made to set this property to null.


An attempt is made to set this property to a FlowDocument that represents the contents of another RichTextBox.


This property is set while a change block has been activated.

A FlowDocument may only be hosted by a single RichTextBox. Specifying a single FlowDocument as the contents of multiple RichTextBox controls is not supported.

The following example illustrates the use of this property.

// Create a simple FlowDocument to serve as content.
FlowDocument flowDoc = new FlowDocument(new Paragraph(new Run("Simple FlowDocument")));
// Create an empty, default RichTextBox.
RichTextBox rtb = new RichTextBox();
// This call sets the contents of the RichTextBox to the specified FlowDocument.
rtb.Document = flowDoc;
// This call gets a FlowDocument representing the contents of the RichTextBox.
FlowDocument rtbContents = rtb.Document;

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.