If he is calling .NET 2.0 .dll's from 1.1 code, I don't see why that should matter. I don't know for sure though, which is why I didn't answer the original poster.

>Hi John, I'm afraid what you want is not possible, it is not 100% forward
>compatible. Some commands are not even there anymore.
>
>
>HTH.
>
>>Hi
>>I have web applications written using ASP.NET 1.1
>>I am planning to upgrade them to .NET 2.0. Since there are couple of modules, I would like to migrate one by one.
>>
>>I would like to know, what should I do for those common libraries? Can I have 1.1 web application accessing 2.0 libraries (Business Object)?
>>
>>Thank you