private void detach_EntityClients(EntityClient entity)
		{
			this.SendPropertyChanging();
			entity.Purpose = null;
		}
		private void attach_EntityClients(EntityClient entity)
		{
			this.SendPropertyChanging();
			entity.Purpose = this;
		}
 partial void UpdateEntityClient(EntityClient instance);
 partial void DeleteEntityClient(EntityClient instance);
 partial void InsertEntityClient(EntityClient instance);