which .net project reference has SessionFactory.CreateEclSession(subject.Session)

Question

i am trying to write 1 event system code for ecl items. i am facing error to use following method SessionFactory.CreateEclSession(subject.Session)

following is the compiler error shown in visual studio:

following are the potential fixes suggested by VS but none suits my purpose:

any suggestion or guidance will be helpful.

Answer 1

You need to have following dlls in your project references in order to have ECL session.

Tridion.ExternalContentLibrary.dll
Tridion.ExternalContentLibrary.V2.dll

Answer 2

It is in Tridion.ExternalContentLibrary.V2 dll.

namespace Tridion.ExternalContentLibrary.V2
{
    public static class SessionFactory
    {
        public static IEclSession CreateEclSession(Session tcmSession);
        public static IEclSession CreateEclSession(string username);
    }
}