private void detach_jkp_PersonContributionRetreats(jkp_PersonContributionRetreat entity)
{
this.SendPropertyChanging();
entity.jkp_Retreat = null;
}
private void attach_jkp_PersonContributionRetreats(jkp_PersonContributionRetreat entity)
{
this.SendPropertyChanging();
entity.jkp_Person = this;
}