MarkupExtensionReturnTypeAttribute Class


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Reports the type that a markup extension can return.

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


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


Initializes a new instance of the MarkupExtensionReturnTypeAttribute class.


Initializes a new instance of the MarkupExtensionReturnTypeAttribute class using the provided Type.

System_CAPS_pubmethodMarkupExtensionReturnTypeAttribute(Type, Type)

Obsolete. Do not use, see Remarks.


Obsolete. Do not use; see Remarks.


Gets the MarkupExtension return type that this .NET Framework attribute reports.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)


Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

A MarkupExtension derived custom class should apply this .NET Framework attribute to indicate a possible type-safe return type that is returned by its ProvideValue implementation. In other words, if a markup extension always returns a more specific type than type of Object, and casting to that type is a primary scenario, the markup extension class should attribute with MarkupExtensionReturnTypeAttribute and report that type.

In previous versions of the .NET Framework, this class existed in the WPF-specific assembly WindowsBase. In .NET Framework 4, MarkupExtensionReturnTypeAttribute is in the System.Xaml assembly. For more information, see Types Migrated from WPF to System.Xaml.

For more information on patterns for implementing a custom XAML markup extension, see MarkupExtension and Type Converters and Markup Extensions for XAML.

.NET Framework
Available since 3.0

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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