throw-activity-designer.md

title	description	ms.date	ms.topic	f1_keywords	author	ms.author	manager	ms.subservice
Workflow Designer - Throw Activity Designer	Learn about the Throw activity and how you can use the Throw activity designer to create and configure a Throw activity.	11/04/2016	reference	System.Activities.Statements.Throw.UI	jodavis	jodavis	mijacobs	workflow-designer

Throw Activity Designer

The Throw activity designer is used to create and configure a xref:System.Activities.Statements.Throw activity.

The Throw Activity

The xref:System.Activities.Statements.Throw activity throws an exception.

Using the Throw Activity Designer

Access the Throw activity designer in the Error Handling category of the Toolbox.

The Throw activity designer can be dragged from the Toolbox and dropped on to the Workflow Designer surface wherever activities are usually placed, such as inside a xref:System.Activities.Statements.Sequence. This creates a xref:System.Activities.Statements.Throw activity with a default DisplayName of Throw. The xref:System.Activities.Activity.DisplayName%2A value can be edited in the header of the Throw activity designer or in the DisplayName box of the property grid. The xref:System.Activities.Statements.Throw.Exception%2A property must be edited on the property grid.

The Throw Properties

The following table shows the xref:System.Activities.Statements.Throw properties and describes how they are used in the designer.

Property Name	Required	Usage
xref:System.Activities.Activity.DisplayName%2A	False	Specifies the optional friendly name of the xref:System.Activities.Statements.Throw activity. The default is Throw.
xref:System.Activities.Statements.Throw.Exception%2A	True	The exception to throw. This exception must derive from xref:System.Exception. To specify the exception, type a Visual Basic expression in the property grid.

See also

• Collection
• Rethrow
• Throw Activity Designer
• TryCatch