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XmlnsDefinitionAttribute Class

Specifies a mapping in an assembly between an XML namespace identifier and a CLR namespace within that assembly.

System.Object
  System.Attribute
    System.Windows.Markup.XmlnsDefinitionAttribute

Namespace:  System.Windows.Markup
Assembly:  System.Windows (in System.Windows.dll)

[AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple = true)]
public sealed class XmlnsDefinitionAttribute : Attribute

The XmlnsDefinitionAttribute type exposes the following members.

  NameDescription
Public methodSupported by Silverlight for Windows PhoneXmlnsDefinitionAttributeInitializes a new instance of the XmlnsDefinitionAttribute class.
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  NameDescription
Public propertySupported by Silverlight for Windows PhoneAssemblyNameGets or sets the name of the assembly that contains the ClrNamespace.
Public propertySupported by Silverlight for Windows PhoneClrNamespaceGets the CLR namespace that is mapped to XmlNamespace by the attribute.
Public propertySupported by Silverlight for Windows PhoneXmlNamespaceGets the XML namespace (xmlns) that is mapped to ClrNamespace by the attribute.
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  NameDescription
Public methodSupported by Silverlight for Windows PhoneEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodSupported by Silverlight for Windows PhoneFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodSupported by Silverlight for Windows PhoneGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodSupported by Silverlight for Windows PhoneMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneToStringReturns a string that represents the current object. (Inherited from Object.)
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In a XAML file, if the xmlns attribute for an element tag or attribute matches the XmlNamespace in the XmlnsDefinitionAttribute, a XAML processor can use the ClrNamespace and AssemblyName stored in the XmlnsDefinitionAttribute to check if the element or attribute matches any type inside the namespace in the assembly. This is how a XAML processor can discover the assemblies that define the types that are created when processing XAML into an object tree. In particular, a XAML processor uses XmlnsDefinitionAttribute from known and loaded reference assemblies for cases where the namespace identifier is a URI, and the namespace is not defined by an explicit CLR-namespace/assembly combination.

For more information on how to use XmlnsDefinitionAttribute and XmlnsPrefixAttribute to declare XAML namespaces and hint a prefix for designers, see "Applying XAML Namespace Attributes to Custom Assemblies" section of Silverlight XAML Namespaces, and Mapping XAML Namespaces as Prefixes.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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

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