<PackageReference Include="System.Diagnostics.EventLog" Version="10.0.0-rc.2.25502.107" />

System.Diagnostics.Eventing.Reader.EventProperty

public sealed class EventProperty
Contains the value of an event property that is specified by the event provider when the event is published.
namespace System.Diagnostics.Eventing.Reader { public sealed class EventProperty { public object Value { get; } } }