Activity Represents an operation with context to be used for logging.

 DiagnosticListener Provides an implementation of the abstract class that represents a named place to which a source sends its information (events).

 ActivitySpanId Represents a formatted based on a W3C standard.

 ActivityTraceId Represents a whose format is based on a W3C standard.

 ActivityIdFormat Specifies the format of the property.

 ActivityTraceFlags Specifies flags defined by the W3C standard that are associated with an activity.

 DiagnosticSource An abstract class that allows code to be instrumented for production-time logging of rich data payloads for consumption within the process that was instrumented.