SPListItem.SystemUpdate method (Boolean)

Updates the database with changes that are made to the list item without changing the Modified or Modified By fields, or optionally, the item version.

Namespace:  Microsoft.SharePoint
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

public void SystemUpdate(
	bool incrementListItemVersion


Type: System.Boolean

true to increment the item version; otherwise, false.

When the SystemUpdate method is called, events are triggered, the modifications are reported in the Change and Audit logs, but alerts are not sent and properties are not demoted into documents.