FIX: Error message when you view a page in design mode after you recompile a .NET Framework 3.5 Service Pack 1-based project: "Error creating control – 'ControlInstanceName [text]' could not be set on property 'PropertyName'"
On a computer that has the Microsoft .NET Framework 3.5 Service Pack 1 (SP1) installed, you have a Web site or a Web application project that contains some Web controls. When you view the page in design mode after you recompile the project, you receive an error message that resembles the following:
Error creating control – 'ControlInstanceName [text]' could not be set on property 'PropertyName'
Hotfix Replacement Information
The hotfix that corresponds to KB961847 has been superseded with the hotfix KB981201, which contains all fixes that were previously included in KB961847. You should use the hotfix KB981201 to fix the issues described in KB961847. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
981201 A hotfix is available for ASP.NET 2.0 that enables support for extended protection
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.