Occurs when a component has been changed.
Assembly: System (in System.dll)
This event occurs when any component on the form changes. This event will not occur during form load and unload, because changes are expected at this time.
A DesignerTransaction can raise multiple events. Some event handlers can interfere with expected sequences of events, such as if your code alters the values of properties while a transaction is occurring. A event handler can also impair performance if it draws after each change while a DesignerTransaction is in progress. In order to allow a DesignerTransaction in process to complete without interruption or interference by your event handler, you can test the state of the InTransaction property, and defer handling the change events until the completion of the transaction by adding a DesignerTransactionCloseEventHandler which will raise your event handler and remove itself upon completion of the transaction.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2