* Defined Input and Output create/read methods in the calculation related Create/Read Extension methods, for improved consistency. * Fixed typo. * Refactored softcasts to hard casts in unit test. * Use of CollectionAssert.IsEmpty Related to Issue [WTI-908] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@6310 5a3db67b-de53-47b5-99c8-a1c30a6650e2