Gets a globally unique identifier (GUID) that specifies the type of work items in the SPWorkItemCollection collection. The types themselves are user defined.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
WorkItemType is a primary sort key. The type property is user definable, such that setting a GUID property on a specific work item collection defines the type for the entire collection. You can then associate a name with that type.
The ISPWorkItemHost handlers for processing runnable work items are specific to work item types.