We just recently upgraded Visual Studio from 2005 to 2010. Our solution was not upgraded to the 4.0 framework, as our user base is still on the 2.0 framework. The solution loads fine, runs fine and we were ready to get back to work.
We have hundreds of custom user controls. When in 2005, we created a user control in our solution, it would show up in the toolbox and from there we could drag & drop the user control onto any given form.
As we were developing, we noticed that our custom user controls are not showing up in the Toolbox in Visual Studios designer. Has anyone ran across this issue? How were you able to get them to show up?