Moved CanAddPipingFailureMechanism logic to WtiProject Changed calls to Assert.Null to Assert.IsNull and Assert.NotNull to Assert.IsNotNull. (consistency) Paired with bouvrie Related to Issue [WTI-13] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@284 5a3db67b-de53-47b5-99c8-a1c30a6650e2