// <Name>Types that used to be 100% covered but not anymore</Name>
warnif count > 0
from t in JustMyCode.Types where 
   t.IsPresentInBothBuilds() &&
   t.OlderVersion().PercentageCoverage == 100 &&
   t.PercentageCoverage < 100
let culpritMethods = t.Methods.Where(m => m.PercentageCoverage < 100)
select new {t, t.PercentageCoverage, culpritMethods }