Hey,
I'm working on the sample for Chapter 2 titled - Create a Custom Web Part Programmatically (pg 60). I'm able to do a build and run the new project in debug mode. However, after trying to add the new web part to the site, I get the following error.

"A Web Part or Web Form Control on this Page cannot be displayed or imported. The type could not be found or it is not registered as safe."

I'm assuming this is will continue to be an issue throughout the rest of the book for me unless I get this resolved for this sample. What do I need to do in order for this web part to run successfully?

Ok,
I've spent several hours working on this and now understand what the problem is. The issue deals with the namespace MyFirstWebPart.MyFirstWebPart within the code. I was able to first create a blank web part and then after that create a web part with the author's code to get this working.

I'm glad it was just this that was the issue as the community recommended creating a strong name for the assembly, opening up the web.config file to add a new safecontrol line item, and then finally adding the assembly to the gac. As this is my first experience with web parts, it seemed to require a lot more steps for something that you shouldn't have to think twice about.