<PackageReference Include="System.Diagnostics.EventLog" Version="8.0.0-preview.4.23259.5" />

StandardEventOpcode

public enum StandardEventOpcode
Defines the standard opcodes that are attached to events by the event provider. For more information about opcodes, see EventOpcode.
namespace System.Diagnostics.Eventing.Reader { public enum StandardEventOpcode { Info = 0, Start = 1, Stop = 2, DataCollectionStart = 3, DataCollectionStop = 4, Extension = 5, Reply = 6, Resume = 7, Suspend = 8, Send = 9, Receive = 240 } }