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IsNull class

Defines a workflow activity that checks if a specified object is empty (a null reference (Nothing in Visual Basic)).

Inheritance hierarchy

System.Object
  System.Activities.Activity
    System.Activities.ActivityWithResult
      System.Activities.Activity<Boolean>
        Microsoft.SharePoint.WorkflowServices.Activities.IsNull

Namespace:  Microsoft.SharePoint.WorkflowServices.Activities
Assembly:  Microsoft.SharePoint.WorkflowServices.Activities (in Microsoft.SharePoint.WorkflowServices.Activities.dll)

Syntax

'Declaration
Public NotInheritable Class IsNull _
    Inherits Activity(Of Boolean)
'Usage
Dim instance As IsNull
public sealed class IsNull : Activity<bool>

Thread safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See also

Reference

IsNull members

Microsoft.SharePoint.WorkflowServices.Activities namespace