.NET Framework 4.6 and 4.5
Occurs when the display settings are changing.
public static event EventHandler DisplaySettingsChanging
System event notifications are not supported under the current context. Server processes, for example, might not support global system event notifications.
The attempt to create a system events window thread did not succeed.
Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result.
Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1