Call elements of an Linq executed stored procedure

Answer 1

You need parentheses after the stored procedure: blabla.Gesellschaft().

Answer 2

returnset is not of type getDetailsResult, it is of type ISingleResult<getDetalsResult>, so casting returnset to getDetailsResult will throw an exception.

As Albin Sunnabo says, assign lala the value of returnset.First() and you will be able to use it, so long as there is a result. the First extension method will return the first result of your stored procedure.

getDetailsResult lala = returnset.First();