Question

First (which works) :

IEnumerable<PacchettoOfferta> PacchettiTemp = from PacchettoOfferta a in SottoPagina.PacchettiOfferte
                                              select a;
Pacchetti = Pacchetti.Union(PacchettiTemp);

Second (which doesn’t work, Unable to cast object of type) :

Pacchetti = Pacchetti.Union((IEnumerable<PacchettoOfferta>)SottoPagina.PacchettiOfferte);

Why? I’d like to use the second statement… What are the differences? And what do I need to do in order to fix it?

Answer 1

If SottoPagina.PacchettiOfferte is not an IEnumerable<PacchettoOfferta>, you can’t cast it to this type.

Try using the Enumerable.Cast Extension Method:

Pacchetti = Pacchetti.Union(SottoPagina.PacchettiOfferte.Cast<PacchettoOfferta>());