I am running into a situation where when I load
Microsoft.SqlServer.Types my app is running slower.
To show you what is going on, I've been able to get the smallest app
as possible.

Here
http://www.slideshare.net/jeffblankenburg/migrating-to-visual-studio-2008-net-fr
amework-35 it is given as
   * Watch out for XML and Regular Expressions
         o XMLDocuments cause heavy CPU load – use XMLReader/Writers

first I tried to run Dictionary.exe on my system.
It didn't.
Then I had a look at
Ausführen (I don't know the English expression for that) : eventvwr