CorrelationAliasAttribute Class

Note: This API is now obsolete.

Overrides the correlation parameter value when the correlation value must be obtained from a parameter other than that indicated by the CorrelationParameterAttribute. This class cannot be inherited.

Namespace:   System.Workflow.Activities
Assembly:  System.Workflow.Activities (in System.Workflow.Activities.dll)


<AttributeUsageAttribute(AttributeTargets.Method Or AttributeTargets.Event Or AttributeTargets.Delegate,
	AllowMultiple := True)>
<ObsoleteAttribute("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")>
Public NotInheritable Class CorrelationAliasAttribute
	Inherits Attribute

System_CAPS_pubmethodCorrelationAliasAttribute(String, String)

Initializes a new instance of the CorrelationAliasAttribute with the name of the correlation that is being aliased and the path to where the value can be found.


Gets the name of the correlation parameter that is being aliased.


Gets the path within the parameter that specifies the location of the correlation value.


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.)


This material discusses types and namespaces that are obsolete. For more information, see Deprecated Types in Windows Workflow Foundation 4.5.

To match an incoming message with the appropriate workflow instance, the message and the workflow instance must share a key. This key is called a correlation set. Typically, the key can be a single-valued correlation set. This means that an ID field in the message can be matched against an ID of the same type that is held by schedule instances.

The CorrelationAliasAttribute is applied to a method or an event on an interface on a data exchange interface.

The following code example shows how to use a CorrelationAliasAttribute to override a CorrelationParameterAttribute. This code example is from the CorrelatedLocalService SDK sample. For more information, see.5a3d0733-bbea-4dbf-88ee-a8316db55fbd

public interface ITaskService2
    void CreateTask(string taskId, string assignee, string text);

    [CorrelationAlias("taskId", "e.Id")]
    event EventHandler<TaskEventArgs> TaskCompleted;

.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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