public virtual T Save(T entity)
{
entity.PrepareSave();
if (entity.Id == 0)
{
contextBD.Set <T>().Add(entity);
contextBD.Entry(entity).State = EntityState.Added;
}
else
{
contextBD.Set <T>().Attach(entity);
contextBD.Entry(entity).State = EntityState.Modified;
}
contextBD.SaveChanges();
return(entity);
}