Tracking services are used to define tracking information that you want a workflow instance to emit during its execution and to provide a tracking channel on which the workflow instance can send this specified information back to the host application. Tracking services can be optionally added to the workflow runtime engine; unlike some of the other core services, a tracking service is not required by the workflow runtime engine. You can use the classes and interface defined in the System.Workflow.Runtime.Tracking namespace to either implement a custom tracking service, or to use the out-of-box SQL tracking service.

 Classes

	Class	Description
	ActivityDataTrackingExtract	Specifies a property or a field to be extracted from an activity and sent to the tracking service together with an associated collection of annotations when a track point is matched.
	ActivityTrackingCondition	Represents a condition that compares the value of an activity member to a specified value by using a specified comparison operator.
	ActivityTrackingLocation	Defines an activity-qualified location that corresponds to an activity status event in the potential execution path of a root workflow instance. This class cannot be inherited.
	ActivityTrackingLocationCollection	Contains a collection of ActivityTrackingLocation objects.
	ActivityTrackingRecord	Contains the data sent to a tracking service by the runtime tracking infrastructure when an ActivityTrackPoint is matched. It is also used in the return list of the ActivityEvents property.
	ActivityTrackPoint	Defines a point, associated with an activity execution status change, to be tracked that is in the potential execution path of a workflow instance. This class cannot be inherited.
	ActivityTrackPointCollection	Contains a collection of ActivityTrackPoint objects.
	ExtractCollection	Contains a collection of TrackingExtract objects.
	ProfileRemovedEventArgs	Provides data for the ProfileRemoved event. This class cannot be inherited.
	ProfileUpdatedEventArgs	Provides the data for the ProfileUpdated event. This class cannot be inherited.
	SqlTrackingQuery	Contains methods and properties that are used to manage queries to the tracking data that is contained in the SQL database used by a SqlTrackingService.
	SqlTrackingQueryOptions	Contains properties that are used to constrain the set of SqlTrackingWorkflowInstance objects returned by a call to SqlTrackingQuery..::.GetWorkflows.
	SqlTrackingService	Represents a tracking service that uses a SQL database to store tracking information.
	SqlTrackingWorkflowInstance	Provides access to tracking data maintained in a SQL database by the SqlTrackingService for a workflow instance.
	TrackingAnnotationCollection	Contains a collection of annotations.
	TrackingChannel	The abstract base class that represents a tracking channel.
	TrackingCondition	An abstract base class representing a comparison that can be used to constrain an ActivityTrackingLocation or a UserTrackingLocation.
	TrackingConditionCollection	Contains a collection of TrackingCondition objects.
	TrackingDataItem	Represents a single item of data extracted from a workflow and all its associated annotations.
	TrackingDataItemValue	Contains filter criteria for data extracted from a workflow instance in a SqlTrackingQueryOptions.
	TrackingExtract	The abstract base class representing a field or a property to be extracted from a workflow instance and its associated annotations.
	TrackingParameters	Contains information about the workflow instance associated with a TrackingChannel. This class cannot be inherited.
	TrackingProfile	Defines points of interest in the potential execution path of a root workflow instance about which a tracking service should be notified.
	TrackingProfileCache	Provides a method that a host application can use to clear the tracking profile cache.
	TrackingProfileDeserializationException	The exception that is thrown when an XML document cannot be deserialized into a TrackingProfile by a TrackingProfileSerializer.
	TrackingProfileSerializer	Provides methods to serialize and deserialize tracking profiles into and from XML documents by using the tracking profile XML schema definition (XSD).
	TrackingRecord	The abstract base class from which ActivityTrackingRecord, UserTrackingRecord, and WorkflowTrackingRecord are derived.
	TrackingService	The abstract base class that provides the basic interface between a tracking service and the run-time tracking infrastructure.
	TrackingWorkflowChangedEventArgs	Contains data associated with a workflow change that occurs during the execution of a workflow instance.
	TrackingWorkflowExceptionEventArgs	Contains data associated with an exception that occurs during the execution of a workflow instance.
	TrackingWorkflowSuspendedEventArgs	Contains information about the reason that a workflow instance was suspended.
	TrackingWorkflowTerminatedEventArgs	Contains data associated with the termination of a workflow instance.
	UserTrackingLocation	Defines an activity-qualified location that corresponds to a user event in the potential execution path of a root workflow instance. This class cannot be inherited.
	UserTrackingLocationCollection	Contains a collection of UserTrackingLocation objects.
	UserTrackingRecord	Contains the data sent to a tracking service by the runtime tracking infrastructure when a UserTrackPoint is matched.
	UserTrackPoint	Defines a point, associated with a user event, to be tracked in the potential execution path of a root workflow instance. This class cannot be inherited.
	UserTrackPointCollection	Contains a collection of UserTrackPoint objects.
	WorkflowDataTrackingExtract	Specifies a property or a field to be extracted from the root activity of the workflow and sent to the tracking service together with and an associated collection of annotations when a track point is matched.
	WorkflowTrackingLocation	Defines an interest in specific workflow status events that occur in a root workflow instance; used for matching by a WorkflowTrackPoint in a tracking profile. This class cannot be inherited.
	WorkflowTrackingRecord	Contains the data sent to the tracking service by the runtime tracking infrastructure when it matches a WorkflowTrackPoint. It is also used in the return list of the WorkflowEvents property.
	WorkflowTrackPoint	Defines a point associated with a set of workflow status events that are tracked in the potential execution path of a root workflow instance.
	WorkflowTrackPointCollection	Contains a collection of WorkflowTrackPoint objects.

 Interfaces

	Interface	Description
	IProfileNotification	Provides a notification mechanism for a tracking service to inform the runtime tracking infrastructure about changes to the TrackingProfile for a particular workflow Type.

 Enumerations

	Enumeration	Description
	ComparisonOperator	Specifies the operation to perform on the operands of a comparison.
	TrackingWorkflowEvent	Specifies a type of workflow status event.