DependsOnAttribute Class


Indicates that the attributed property is dependent on the value of another property.

public ref class DependsOnAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Method | System.AttributeTargets.Property, AllowMultiple=true)]
public sealed class DependsOnAttribute : Attribute
[<System.AttributeUsage(System.AttributeTargets.Method | System.AttributeTargets.Property, AllowMultiple=true)>]
type DependsOnAttribute = class
    inherit Attribute
Public NotInheritable Class DependsOnAttribute
Inherits Attribute


The Save method on XamlWriter will process the specified property before processing the property that this attribute is set on.

The name value applied to this attribute must be the simple unqualified name of a property that exists in the same type. You cannot specify attached properties as being dependent.

When applying this attribute, care must be taken to avoid circular dependencies. Circular dependencies are only detected when all the properties in the cycle have been written and even so the behavior is nondeterministic.

Applying this attribute to a property definition ensures that the dependent properties are processed first in XAML object writing. It is part of the general rules of XAML markup that attribute values applied for a created object should be able to be processed in any order. Usages of DependsOnAttribute specify the exceptional cases of properties on types where a specific order of parsing must be followed for valid object creation.

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

WPF Usage Notes

The Value property on the Setter class is an example of a property in WPF where the DependsOnAttribute attribute is applied. Value depends on Property and TargetName being processed first, otherwise there is no way to know what type is supposed to be created for value converter cases.



Initializes a new instance of the DependsOnAttribute class.



Gets the name of the related property declared in this DependsOnAttribute.


Gets a unique identifier for this DependsOnAttribute.



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)

Creates a shallow copy of the current Object.

(Inherited from Object)

Returns a string that represents the current object.

(Inherited from Object)

Explicit Interface Implementations

_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)

Applies to

See also