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Editorial Team
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Asked: 2026-05-14T02:45:54+00:00

xmlns=http://schemas.microsoft.com/winfx/2006/xaml/presentation How is this url mapped to .NET namespaces? Can you give an example

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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

How is this url mapped to .NET namespaces? Can you give an example how to do the same thing for custom .NET classes/namespaces? Is it an attribute that has to be defined on the namespace itself?

Or is it a matter or using C# aliases as in?:

using alias = FullNamespace
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1 Answer

  1. Editorial Team

    The mapping is done using the XmlnsDefinition attribute. For instance :

    [assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Data")]
[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows")]
[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Controls.Primitives")]
[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Media.Animation")]
[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Input")]

    (code from PresentationFramework.dll extracted with Reflector)

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