<PackageReference Include="System.Diagnostics.EventLog" Version="9.0.0-preview.4.24266.19" />

EventBookmark

public sealed class EventBookmark
Represents a placeholder (bookmark) within an event stream. You can use the placeholder to mark a position and return to this position in a stream of events. An instance of this object can be obtained from an EventRecord object, in which case it corresponds to the position of that event record.
namespace System.Diagnostics.Eventing.Reader { public sealed class EventBookmark { public string BookmarkXml { get { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_EventLog); } } internal EventBookmark() { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_EventLog); } public EventBookmark(string bookmarkXml) { throw new PlatformNotSupportedException(System.SR.PlatformNotSupported_EventLog); } } }