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XDeclaration Constructor (String, String, String)

Initializes a new instance of the XDeclaration class with the specified version, encoding, and standalone status.

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

public XDeclaration(
	string version,
	string encoding,
	string standalone
)

Parameters

version
Type: System.String

The version of the XML, usually "1.0".

encoding
Type: System.String

The encoding for the XML document.

standalone
Type: System.String

A string containing "yes" or "no" that specifies whether the XML is standalone or requires external entities to be resolved.

The following example creates a document that contains a declaration.

XDocument doc = new XDocument(
    new XDeclaration("1.0", "utf-8", "yes"),
    new XComment("This is a comment"),
    new XElement("Root", "content")
);
doc.Save("Root.xml");

Console.WriteLine(File.ReadAllText("Root.xml"));

This example produces the following output:

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<!--This is a comment-->
<Root>content</Root>

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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