System.Activities Namespaces

Visual Studio 2010

.NET Framework (current version)

The System.Activities namespaces contain all the classes necessary to create and work with activities in Window Workflow Foundation.

Namespaces

Namespace	Description
System.Activities	The System.Activities namespace contains all of the classes necessary to create and work with activities. The classes in this namespace allow you to define activities, define the data flow into and out of activities, and define variables.
System.Activities.Core.Presentation	The System.Activities.Core.Presentation namespace contains helper classes used in the default and extensibility scenarios for the Windows Workflow Designer.
System.Activities.Core.Presentation.Factories	Provides factories for creating activities that interact with collections and enable control flow in the Windows Workflow Designer.
System.Activities.Core.Presentation.Themes	The System.Activities.Core.Presentation.Themes namespace contains a class that is a collection of style configuration values used by the Windows Workflow Designer and activity designers.
System.Activities.Debugger	The System.Activities.Debugger namespace contains classes that provide support for debugging of workflows in Visual Studio 2010.
System.Activities.DurableInstancing	This namespace contains the SqlWorkflowInstanceStore and its helper classes. The SqlWorkflowInstanceStore class provides durability to workflow instances.
System.Activities.ExpressionParser	The System.Activities.ExpressionParser namespace contains classes that support the compilation of expressions.
System.Activities.Expressions	The System.Activities.Expressions namespace contains classes and expression activities that support the use of expressions in a workflow.
System.Activities.Hosting	The System.Activities.Hosting namespace contains classes that provide the base support for hosting and executing a workflow.
System.Activities.Persistence	The System.Activities.Persistence namespace contains classes for capturing an object’s state independent of process or machine information.
System.Activities.Presentation	The System.Activities.Presentation namespace contains base activity designer classes used to create custom activity designers. For more information about creating custom activity designers, see Creating a Custom Activity Designer.
System.Activities.Presentation.Converters	Provides converters for arguments, UI property data, and items in the editing model of the Windows Workflow Designer.
System.Activities.Presentation.Debug	Contains classes that provide breakpoint management for a debugging process.
System.Activities.Presentation.Hosting	Contains classes that enable the Windows Workflow Designer host to interact with assemblies, commands, and imported namespaces.
System.Activities.Presentation.Metadata	Contains classes that enable you to work with custom attributes of Windows Workflow Designer elements.
System.Activities.Presentation.Model	Contains classes that enable you to work with model items in the model tree of the designer such as accessing the model items properties and attached properties. Also, provides functionality to manage the model tree.
System.Activities.Presentation.PropertyEditing	Contains classes that enable updating properties in the Windows Workflow Designer by providing property editors, category editors, and access to properties, property values, and filters.
System.Activities.Presentation.Services	Provides classes that enable interacting with the model tree in the Windows Workflow Designer to perform tasks such as creating and locating model items, and mapping view items with model items.
System.Activities.Presentation.Toolbox	This namespace provides support for classifying and using tools when re-hosting the Windows Workflow Designer outside of Visual Studio 2010.
System.Activities.Presentation.Validation	Contains classes that provide activity validation functionality for activities in the Windows Workflow Designer.
System.Activities.Presentation.View	Provides functionality related to the view elements in the workflow designer including accessing and creating view elements, accessing commands, working with the view state, selections, and the expression textbox.
System.Activities.Statements	The System.Activities.Statements namespace contains activities that can be used to create workflows. This namespace contains activities that are used for flow control, interacting with collections and variables, exceptions, compensation, transactions, and interacting with legacy workflows.
System.Activities.Statements.Tracking	Provides classes for monitoring state machine state executions and state transitions.
System.Activities.Tracking	The System.Activities.Tracking namespace contains classes used to create and interact with workflow tracking records. Tracking records are created by the workflow runtime when a workflow instance executes, and are accessed by classes that inherit from TrackingParticipant.
System.Activities.Validation	The System.Activities.Validation namespace contains classes used for custom activity validation. Custom validation for activities is provided by the ActivityValidationServices class, and custom validation conditions can be created using Constraint and Constraint<T>.
System.Activities.XamlIntegration	Contains classes that provide support for the serialization of activities into XAML.