ContentPlaceHolderDesigner Class

Note: This class is new in the .NET Framework version 2.0.

Extends design-time behavior for the ContentPlaceHolder Web server control.

Namespace: System.Web.UI.Design.WebControls
Assembly: System.Design (in

public class ContentPlaceHolderDesigner : ControlDesigner
public class ContentPlaceHolderDesigner extends ControlDesigner
public class ContentPlaceHolderDesigner extends ControlDesigner

Extend the ContentPlaceHolderDesigner class if you want to create a designer for a class that extends the ContentPlaceHolder control.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

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

.NET Framework

Supported in: 2.0