public void Save(Project aggregateRoot)
{
Guard.ThrowIfNull(aggregateRoot, nameof(aggregateRoot));
var state = aggregateRoot.GetState();
var existing = _context.Projects.SingleOrDefault(p => p.ProjectId == state.ProjectId.Value);
if (existing != null)
{
existing.UpdateFrom(state);
}
else
{
_context.Projects.Add(ProjectDao.CreateFrom(state));
}
_context.SaveChanges();
}