This documentation is archived and is not being maintained.

SystemEvents.LowMemory Event

NOTE: This event is now obsolete.

Occurs when the system is running out of available RAM.

Namespace: Microsoft.Win32
Assembly: System (in system.dll)

[ObsoleteAttribute("This event has been deprecated.")] 
public static event EventHandler LowMemory
/** @event */
public static void add_LowMemory (EventHandler value)

/** @event */
public static void remove_LowMemory (EventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
Not applicable.

Exception typeCondition


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.

This event wraps the WM_COMPACTING message. This message is sent to all top-level windows when the system detects more than 12.5 percent of system time over a 30- to 60-second interval is being spent compacting memory. This indicates that system memory is low.

Caution noteCaution:

Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result.

Notes to Callers: This message is provided only for compatibility with 16-bit Windows-based applications.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 1.0, 1.1, 2.0
Obsolete (compiler warning) in 3.0