CorrelationParameterAttribute Class
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CorrelationParameterAttribute Class

Note: This API is now obsolete.

Indicates the name of the parameter used for correlation in the methods and events defined on an ExternalDataExchange interface. This class cannot be inherited.

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


[AttributeUsageAttribute(AttributeTargets.Interface, AllowMultiple = true)]
[ObsoleteAttribute("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
public sealed class CorrelationParameterAttribute : Attribute


Initializes a new instance of the CorrelationParameterAttribute where the name of the parameter is used for correlation.


Gets the name of the parameter used for correlation.


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.

Default setting; can be overridden by the CorrelationAliasAttribute.

The following code example demonstrates how to use a CorrelationParameterAttribute for an EnternalDataExchange interface. This code example is from the CorrelatedLocalService SDK sample. For more information, see .5a3d0733-bbea-4dbf-88ee-a8316db55fbd

public interface ITaskService
    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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