Expose new XML namespace for internal types

[Copilot]

Partially fixes #4029
Fixes #4030

Exposes a new XML namespace http://materialdesigninxaml.net/winfx/xaml/themes-internal (prefix: materialDesignInternal) to make public types from the .Internal sub-namespaces accessible in XAML.

Changes Made

• src/MaterialDesignThemes.Wpf/Properties/AssemblyInfo.cs: Added XmlnsPrefix and XmlnsDefinition assembly attributes registering the new http://materialdesigninxaml.net/winfx/xaml/themes-internal namespace, covering:

  • MaterialDesignThemes.Wpf.Internal
  • MaterialDesignThemes.Wpf.Converters.Internal
  • MaterialDesignThemes.Wpf.Behaviors.Internal

• README.md: Added an "XML Namespaces" subsection under "Getting started" documenting both XML namespaces, with a warning that types from the materialDesignInternal namespace are not guaranteed to maintain backwards-compatibility between versions, and a usage example.

Usage

To use the internal namespace in XAML, declare it as follows:

<Window ...
  xmlns:materialDesignInternal="http://materialdesigninxaml.net/winfx/xaml/themes-internal">

Note: Types exposed via materialDesignInternal are internal implementation details and are not guaranteed to maintain backwards-compatibility between versions.

[nicolaihenriksen]

@copilot There really isn't a need for a runner for this work. Simply make the changes in the .cs file and update the documentation, then I can review the changes.

[nicolaihenriksen]

@copilot please try again.

[Copilot]

@copilot please try again.

Done. Commit 28fbb4c makes the following changes directly to the files:

1. src/MaterialDesignThemes.Wpf/Properties/AssemblyInfo.cs – Added XmlnsPrefix and XmlnsDefinition attributes registering the new http://materialdesigninxaml.net/winfx/xaml/themes-internal namespace (prefix: materialDesignInternal) covering MaterialDesignThemes.Wpf.Internal, MaterialDesignThemes.Wpf.Converters.Internal, and MaterialDesignThemes.Wpf.Behaviors.Internal.

2. README.md – Added an "XML Namespaces" subsection documenting both namespaces, with a warning that types from the internal namespace are not guaranteed to be backwards-compatible between versions.

[nicolaihenriksen]

Looks good to me. @Keboo are you OK with this change?

[Keboo]

Looks good! The new materialDesignInternal XML namespace cleanly exposes the internal types, and the README documentation with the backward-compatibility warning is a nice touch. Approved.