CorrelationManager.ActivityId Property   
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets or sets the identity for a global activity.
public:
 property Guid ActivityId { Guid get(); void set(Guid value); };public Guid ActivityId { get; set; }member this.ActivityId : Guid with get, setPublic Property ActivityId As GuidProperty Value
A Guid structure that identifies the global activity.
Remarks
The ActivityId property gets and sets the global activity identity in the CallContext for the thread. The ActivityId is used for trace transfer operations in trace listeners that override the TraceTransfer method, such as the XmlWriterTraceListener class.