private void detach_EntityAs(EntityA entity)
		{
			this.SendPropertyChanging();
			entity.Primitive = null;
		}
		private void attach_EntityAs(EntityA entity)
		{
			this.SendPropertyChanging();
			entity.Primitive = this;
		}
 partial void UpdateEntityA(EntityA instance);
 partial void DeleteEntityA(EntityA instance);
 partial void InsertEntityA(EntityA instance);