partial void DeleteActivity_Relay_ZongChengji(Activity_Relay_ZongChengji instance);
		private void detach_Activity_Relay_ZongChengji(Activity_Relay_ZongChengji entity)
		{
			this.SendPropertyChanging();
			entity.Activity_Relay = null;
		}
 partial void InsertActivity_Relay_ZongChengji(Activity_Relay_ZongChengji instance);
		private void attach_Activity_Relay_ZongChengji(Activity_Relay_ZongChengji entity)
		{
			this.SendPropertyChanging();
			entity.Activity_Relay_Tag = this;
		}