<PackageReference Include="Microsoft.Win32.SystemEvents" Version="10.0.8" />

Microsoft.Win32.PowerModeChangedEventHandler

public sealed delegate PowerModeChangedEventHandler : MulticastDelegate
Represents the method that will handle the PowerModeChanged event.
public PowerModeChangedEventHandler(object object, IntPtr method)

public virtual IAsyncResult BeginInvoke(object sender, PowerModeChangedEventArgs e, AsyncCallback callback, object object)

public virtual void EndInvoke(IAsyncResult result)

public virtual void Invoke(object sender, PowerModeChangedEventArgs e)