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MarkupExtensionReturnTypeAttribute Class

Specifies the type that a markup extension can return.

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

[AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public sealed class MarkupExtensionReturnTypeAttribute : Attribute
<MarkupExtensionReturnTypeAttribute .../>

A MarkupExtension derived custom class should apply this .NET Framework attribute to indicate the type-safe return type that is returned by its ProvideValue implementation.


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