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XmlWriter.WriteSurrogateCharEntity Method

When overridden in a derived class, generates and writes the surrogate character entity for the surrogate character pair.

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

public abstract void WriteSurrogateCharEntity(
	char lowChar,
	char highChar
)

Parameters

lowChar
Type: System.Char

The low surrogate. This must be a value between 0xDC00 and 0xDFFF.

highChar
Type: System.Char

The high surrogate. This must be a value between 0xD800 and 0xDBFF.

ExceptionCondition
ArgumentException

An invalid surrogate character pair was passed.

This method is only applicable on systems that use UTF-16 encoding.

The surrogate character entity is written in hexadecimal format. The range for surrogate characters is #x10000 to #x10FFFF. The following formula is used to generate the surrogate character entity: (highChar -0xD800) * 0x400 + (lowChar -0xDC00) + 0x10000

For both HTML and XML, the document character set (and therefore the notation of numeric character references) is based on UCS [ISO-10646]. A single numeric character reference in a source document may therefore in some cases correspond to two 16-bit units in a string (a high surrogate and a low surrogate). These 16-bit units are referred to as a surrogate pair.

For more information regarding surrogates or characters, refer to section 3.7 of the Unicode 3.0/Unicode 2.0 standard located at http://www.unicode.org, or section 2.2 of the W3C XML 1.0 Recommendation located at http://www.w3.org/TR/REC-xml#charsets.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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