http://weblogs.asp.net/aaguiar/archive/2006/05/05/Medium-Trust.aspxAs I blogged previously we had some issues to make EntLib 2.0 in Medium Trust. It was not the only one. The most annoying one was that TypeConverters do not work! I found this thread in the MS newsgroups that confirmed it. This is really an importantenCommunityServer 2007 SP1 (Build: 20510.895)