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XmlDictionary Class

Implements a dictionary used to optimize Windows Communication Foundation (WCF)'s XML reader/writer implementations.

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

public class XmlDictionary implements IXmlDictionary

Dictionaries establish a mapping between commonly appearing text strings, and integers, and provide an effective mechanism for compressing and decompressing XML. Windows Communication Foundation (WCF) uses 2 kinds of dictionaries, static and dynamic.

With static dictionaries, both sides of the communication use a predefined dictionary.

With dynamic dictionaries, the sending side can add new strings and their mappings not already in the static dictionary. Dynamic dictionaries are sent out of band with the message. Dynamic dictionaries use the XmlBinaryWriterSession and XmlBinaryReaderSession classes to transmit messages and mappings.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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