Question : Any "gotcha's" for an ASP .NET 2.0 to 3.5 Upgrade

We have a web application that runs on IIS using .NET 2.0 developed and built with Visual Studio 2005.

We're going to upgrade to .NET 3.5 and begin using Visual Studio 2008.  Here are my questions:

1.  I note the runtime is still 2.0-based.  

When I loaded the solution in Visual Studio 2008, I was asked to convert, and I did.  I then checked the target framework for the default project, and it was set to 3.5.  However, all of the other target frameworks for the other projects are set to 2.0.

Do I need to manually set the target frameworks from 2.0 to 3.5 for each of the projects in the solution?

2.  Are there any "gotcha's" anyone can think of to be concerned with a web-application conversion?

As I understand it, the 1.1 to 2.0 migration was a much more difficult issue due to the massive runtime and web-page design changes.  However, 2.0 to 3.5 isn't such a big change.  

I was not at my current job for that upgrade, but I understand there was a problem with some textarea tags using a deprecated attribute that failed to function correctly after the upgrade.

Can anyone think of any similar issues I might encounter?

3.  Any other issues or thoughts anyone has after having done such a conversion themselves?

Thanks, I appreciate the input.

---Dan---

Answer : Any "gotcha's" for an ASP .NET 2.0 to 3.5 Upgrade

1.  I note the runtime is still 2.0-based.  
        3.5 is the extension of 2.0. That's why the base framework is 2.0.
        .net IDE will convert it to 3.5 by itself. Just click on yes

2.  Are there any "gotcha's" anyone can think of to be concerned with a web-application conversion?
       Not at all

3.  Any other issues or thoughts anyone has after having done such a conversion themselves?
      Already answered

Just convert it. You will not find any issue. :)