[dba-VB] The application domain in which the thread was running has been unloaded.

Hi All --

I'm getting the subject error while *compiling/building* a large solution
with 30+ projects under VS2010. This solution includes class libraries,
console and WinForms applications as well as a couple of Web Services.

The subject error does appear on first/second rebuild attempt, and then it
disappears on the subsequent rebuild. 

Have you experience something like that? 
I cannot find on Internet what could cause such an error message while
*compiling/building* a solution. I guess it's somehow related to the web
services projects...

Thank you.

-- Shamil