netcoreapp2.2 
namespace Microsoft.Win32
{
    public sealed class SystemEvents
    {
        [Browsable(false)]
        [EditorBrowsable(EditorBrowsableState.Never)]
        public static event EventHandler? LowMemory;
    }
}
.NET
5.06.07.08.09.010.011.0
.NET Core
2.02.12.23.03.1
.NET Framework
1.01.12.03.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard
2.02.1
Information specific to netcoreapp2.2
Assemblies

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

Microsoft.Win32.SystemEvents , Version=11.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

Referencing

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

Package Microsoft.Win32.SystemEvents (10.0.14) netstandard2.0
Obsolete The LowMemory event has been deprecated and is not supported.
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