Kein plan was das soll..mit der Meldung.
Object reference not set to an instance of an object.: at Shipping.JTL.Interface._2_0.Identification.Credentials.GetHashCode()
at System.Collections.Generic.ObjectEqualityComparer`1.GetHashCode(T obj)
at System.Linq.Lookup`2.InternalGetHashCode
Object reference not set to an instance of an object.: at Shipping.JTL.Interface._2_0.Identification.Credentials.GetHashCode()
at System.Collections.Generic.ObjectEqualityComparer`1.GetHashCode(T obj)
at System.Linq.Lookup`2.InternalGetHashCode