A hotfix is now available for issues most commonly described as "Controls are not being recognized in the code-behind" and "Editing existing .aspx regenerates .aspx.designer.(cs), but most of the controls are now missing”.

This hotfix can be downloaded from: http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=27117

The update addresses the following Connect bugs:

    * Cannot embed standard asp.net controls in Ajax Control Toolkit TabContainer
    * Controls in CreateUserWizard WizardStep not visible as before
    * issue with auto-generated Designer files not addding components
    * Code Generation in 2010 RC doesn’t work the same as 2008 for ASP.NET Application
    * Editing existing .aspx regenerates designer.cs (good) but most of the controls are now missing (bad)
    * ASP.NET designer fails to auto-generate fields
    * Bug in generating the designer.cs file in VS2010 (Converting VS2008 project to VS2010)