SaveChangesAsync - entity with it's related entities

private IEnumerable<Entity> GetRelatedEntities()
{
       //Model = this is an entity

	var entities = new List<Entity>() { Model };
	var t = Model.GetType();
	var props = t.GetProperties().Where(p =>
										   {
											   var ptype = p.PropertyType;

											   if (!ptype.IsGenericType) return false;

												var gtype = ptype.GetGenericTypeDefinition();
												if (gtype == typeof(RelatedEntityList<>))
												{
													return true;
												}

											   return false;
										   }).ToList();

	foreach (var prop in props)
	{
		dynamic pval = Model.GetPropertyValue(prop.Name);

		foreach (dynamic e in pval)
		{
			if (e.EntityAspect.EntityState == EntityState.Detached)
			{
				DomainContext.AddEntity(e);
			}
			entities.Add(e);
		}
	}

	return entities;
}