Question: In my silverlight application I am trying to get the actual dimensions of a png image that I am loading into an image control. 

After scowering through the internet for a while I learned that in silverlight 3 there is an attributes called PixelHeight and PixelWidth.

So I was wondering if it is feasable to upgrade to Silverlight 3 since it is in beta stages, don't want my application to be suddenly riddled with errors. 

Note I am doing this project for a school assignment so versioning of silverlight doesn't really matter.

Answer: 
I've been using Silverlight 3 and Expression Blend 3 since the day they became available (about a month now) and haven't had any real issues. I've even been able to convert a few Silverlight 3 apps into Silverlight 2 apps in pinch.

Note that once you upgrade to Silverlight 3, you can no longer create Silverlight 2 applications on your machine. This means that any apps you create can only be viewed by others that are running the Silverlight 3 beta.

> 
> Once you install the Silverlight 3
> Beta Tools for Visual Studio, your
> development environment will be a
> Silverlight 3 Beta environment.
> Visual Studio 2008 SP1 does not
> support multi-targeting for
> Silverlight applications so you will
> be unable to develop Silverlight 2
> applications once these tools are
> installed. We recommend that you
> install the Silverlight 3 Beta tools
> on a separate environment if you still
> need to have the ability to develop
> Silverlight 2 applications.
> 
> 
> Ensure that you have either Visual
> Studio 2008 SP1 or Visual Web
> Developer Express 2008 SP1 installed
> as it is a prerequisite for the
> Silverlight 3 Beta Tools for Visual
> Studio. Below are the additional
> tools you’ll want to get started:
> 
> 
> <http://silverlight.net/getstarted/silverlight3/default.aspx>
> 
> 
>
Even though Silverlight 3 is expected to be backwards compatible to Silverlight 2, expect to run into some issues. The conversion wizard does a good job but you cannot completely trust it.

why don't you try it and see if you it is seemless in your case?