partial void DeleteSystemOverview(SystemOverview instance);
 partial void UpdateSystemOverview(SystemOverview instance);
		private void detach_SystemOverview(SystemOverview entity)
		{
			this.SendPropertyChanging();
			entity.PC = null;
		}
 partial void InsertSystemOverview(SystemOverview instance);
		private void attach_SystemOverview(SystemOverview entity)
		{
			this.SendPropertyChanging();
			entity.PC = this;
		}