.NET Framework Class Library
IComponentChangeServiceComponentChanging Event

Occurs when a component is in the process of being changed.

Namespace:   System.ComponentModel.Design
Assembly:  System (in System.dll)
Syntax
Event ComponentChanging As [%$TOPIC/bbkbzz2t_en-us_VS_110_1_0_0_0_0%]
event [%$TOPIC/bbkbzz2t_en-us_VS_110_1_0_1_0_0%] ComponentChanging
event [%$TOPIC/bbkbzz2t_en-us_VS_110_1_0_2_0_0%]^ ComponentChanging {
	void add ([%$TOPIC/bbkbzz2t_en-us_VS_110_1_0_2_0_1%]^ value);
	void remove ([%$TOPIC/bbkbzz2t_en-us_VS_110_1_0_2_0_2%]^ value);
}
abstract ComponentChanging : IEvent<[%$TOPIC/bbkbzz2t_en-us_VS_110_1_0_3_0_0%],
    [%$TOPIC/bbkbzz2t_en-us_VS_110_1_0_3_0_1%]>
Remarks

This event occurs before the component is actually changed, and gives the designer a chance to abort the change or perform any pre-change processing. This event does not occur during form load and unload, because changes are expected at this time.

Version Information

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
Platforms

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.