>Tim,
>
>I am using MM .Net 3.5 and I upgraded my project frm 2.4 without anyproblem.
>
>Regarding Infragistics the thing is that once I used an specific version of the subclasses no matter which is the version, at some point I will need to upgrade my projects (that is happening to me now). Infragistics provide a tool that upgrade all Infragistics objects that I have in my project to the new version. But if you subclassed the Infragistics objects liek I did with MM ,Net, the problem is that you need to somehow upgrade that code too.
>
>As far as I know there are not such a tool or any proceddure to upgrade the subclassed Infragistics objects. So my question is how I do that?
> I can't edit the web pages as they can't be opened for the same reason.
>
>Thanks

You need to remove the references in the project that point to the older MM Infragistics assemblies and add the MM Infragistics current assembly references. This assumes the MM Infragistics V 8.1 is compatible with the version of Infragistics controls you are using.

Also check out the dev guide topic on "Third Party Controls - Recompiling Third Party Product Assemblies" if your Infragistics controls are newer than the MM assemblies. Like since MM assemblies are for version 8.1 and if your Infragistics contols are 8.2. If your Infragistics controls are older than 8.1 than I don't have an answer if they will work or not.

Tim