Hello Todd,

Thank you for your detailed explanation of the behavior.

In order to have a Visual Studio Designer working correctly, you would have to have a specific version of the Infragistics Windows forms controls installed on your machine in the GAC.

Let say that you would need to work with 11.2.20112.2028. This means that you would have the base version installed and after that the .2028 service release for it installed also. After that you could create a toolbox for this version into your visual studio, create applications and your designer will work correctly. Assuming that now you try to run an application with Infragistics assemblies having their "Specific Version" property set to True, and this application is used to referenced - 11.2.20112.2034 version, than the designer of the Visual Studio won't be able to find a corresponding design assemblies in the GAC for 11.2.20112.2034, so the controls in the application will appear in the section canvas below the design area. If you set the "Specific Version" to False, clean and rebuild your application, close the designer and reopen it, now your Visual Studio designer will work again, because there are already suitable version installed in your GAC - 11.2.20112.2028.

You could have many different folders in your machine having different sets of the assemblies for the very same 11.2 version (every application will be able to build and run correctly), but then the designer won't work correctly for all of them, because you would have to have Specific Version set to True, and then there won't be such design assemblies into the GAC and the Visual Studio designer won't be able to recognize any of the desired ones, and most probably the controls will appear below your "real" designer. In other words having multiple 11.2 version simultaneously won't allow you to have a designer for each them on the very same machine. Visual Studio designer will work correctly only with the version that is in the GAC and application which have their Specific Version set to False or even if it is set True but then the version have to be 11.2.20112.2028.

Hello Danko,

I have a similar problem I am wondering if you have any suggestions.

We have a very large VS2010, TFS based application that is currently using 11.2.20112.2028.  The needed DLLs for this have been copied to a project\References directory and included in TFS.  As the guy that works with Infragistics here - I thought I'd try the latest patch and installed 11.2.20112.2034.  Then I needed to add a TAB control (make a wizard) to an existing form and tried adding TAB controls - even though the Infragistics2.Win.UltraWinTabControl.v11.2 was already part of the project - all I get is a view-only presentation and controls showing below the form.  I tried dragging the 2028 DLLs from the Reference folder to the Windows\Assembly - and they show as listed/registered (shows all 3 versions: 1010, 2028 and 2034), changing 'Specific Version = true' with the reference pointing to \Reference\<all dlls>, closing, rebooting, clean, and build and still cannot access the controls.