Indicates whether this type is built top-down during XAML object graph creation.
Assembly: System.Xaml (in System.Xaml.dll)
Initializes a new instance of theclass.
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.)
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.)
|_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)|
Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)
|_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.)
|_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)|
Provides access to properties and methods exposed by an object.(Inherited from Attribute.)
Top-down is a metaphor that approximates XAML processor behavior when creating the object graph. When built top-down, a class is instantiated, attached to the parent, and then has its properties set. Top-down construction avoids invoking property-changed handlers multiple times. Such handling will ripple up the object graph and therefore eliminating the multiple handler calls provides a performance optimization for startup of the object graph.
In previous versions of the .NET Framework, this class existed in the WPF-specific assembly WindowsBase. In .NET Framework 4, Types Migrated from WPF to System.Xaml.is in the System.Xaml assembly. For more information, see
In WPF XAML for .NET Framework 3.0 and .NET Framework 3.5, top-down construction was built in to the XAML processing for certain classes. Theattribute formalizes the reporting of the top-down behavior in .NET Framework 4.
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.