public Pinboard(IPosterGenerator <T1> generator1,
IPosterGenerator <T2> generator2,
IPosterGenerator <T3> generator3)
{
public static Pinboard <T1, T2, T3> Create(IPosterGenerator <T1> generator1,
IPosterGenerator <T2> generator2,
IPosterGenerator <T3> generator3)
{
return(new Pinboard <T1, T2, T3>(generator1, generator2, generator3));
}