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EventWrittenEventArgs.ActivityId Property

.NET Framework 4.6 and 4.5

[Supported in the .NET Framework 4.5.1 and later versions]

Gets the activity ID on the thread that the event was written to.

Namespace:  System.Diagnostics.Tracing
Assemblies:   System.Diagnostics.Tracing (in System.Diagnostics.Tracing.dll)
  mscorlib (in mscorlib.dll)

'Declaration
Public ReadOnly Property ActivityId As Guid

Property Value

Type: System.Guid
The activity ID on the thread that the event was written to.

Retrieving the value of the ActivityId property accesses thread local storage. This has the following implications:

  • The ActivityId field is valid only for the duration of the EventListener.OnEventWritten callback.

  • If the activity ID is changed during the callback, the activity ID returned by the ActivityId property is invalid.

.NET Framework

Supported in: 4.6, 4.5.1

Supported in: Windows Phone 8.1
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