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Underline Constructor (TextPointer, TextPointer)

Initializes a new instance of the Underline class, taking two TextPointer objects that indicate the beginning and end of a selection of content to be contained by the new Underline.

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

public Underline(
	TextPointer start,
	TextPointer end
)
You cannot use constructors in XAML.

Parameters

start
Type: System.Windows.Documents.TextPointer

A TextPointer indicating the beginning of a selection of content to be contained by the new Underline.

end
Type: System.Windows.Documents.TextPointer

A TextPointer indicating the end of a selection of content to be contained by the new Underline.

ExceptionCondition
ArgumentNullException

Raised when start or end is null.

ArgumentException

Raised when start and end do not resolve to a range of content suitable for enclosure by a Underline element, for example, if start and end indicate positions in different paragraphs.

This constructor is intended to initialize a new Underline element such that it encloses a selection of pre-existing content.

The following example demonstrates usage of this constructor.

// Create a paragraph and three text runs to serve as example content.  
Paragraph parx = new Paragraph();
Run run1 = new Run("Text run 1.");
Run run2 = new Run("Text run 2, make underlined.");
Run run3 = new Run("Text run 3.");

// Add the three text runs to the paragraph, separated by linebreaks.
parx.Inlines.Add(run1);
parx.Inlines.Add(new LineBreak());
parx.Inlines.Add(run2);
parx.Inlines.Add(new LineBreak());
parx.Inlines.Add(run3);

// After this line executes, the selection of content 
// indicated by the "start" and "end" parameters will be
// enclosed by the new Underline.  In this case, the new Underline 
// will enclose the second text run, "run2".
Underline underx = new Underline(run2.ContentStart, run2.ContentEnd);

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5, 3.0
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