net10.0 
namespace Microsoft.Win32
{
    public sealed class SystemEvents
    {
        [Obsolete("SystemEvents.EventsThreadShutdown callbacks are not run before the process exits. Use AppDomain.ProcessExit instead.", DiagnosticId = "SYSLIB0059", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
        public static event EventHandler? EventsThreadShutdown;
    }
}
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.NET
5.06.07.08.09.010.0
.NET Core
3.03.1
.NET Framework
2.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net10.0
Assembly

Microsoft.Win32.SystemEvents , Version=10.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

Referencing

Your project needs a package reference to Microsoft.Win32.SystemEvents.

Package Microsoft.Win32.SystemEvents (10.0.1) net10.0
Obsolete SYSLIB0059: SystemEvents.EventsThreadShutdown callbacks are not run before the process exits. Use AppDomain.ProcessExit instead.
Platform Restrictions

The event adder is only supported on the following platforms:

  • Windows

The event remover is only supported on the following platforms:

  • Windows
  • Built-in API
  • Package-provided API