private static ISessionFactory BuildNHibernateSessionFacotory()
{
var typesThatShouldBeMapped = Assembly.GetAssembly(typeof(Entity)).GetExportedTypes().Where(t => t.Namespace.EndsWith("DTOs"));
var cfg = new NHibernate.Cfg.Configuration();
cfg.Properties[NHibernate.Cfg.Environment.CollectionTypeFactoryClass] = typeof(Sharetronix.Cfg.ForNHibernate.Net4CollectionTypeFactory).AssemblyQualifiedName;
cfg = cfg.AddAutoMappings(typesThatShouldBeMapped, customClassMappings);
if (isNewInstance)
cfg.CreateDatabaseTables();
return cfg.BuildSessionFactory();
}