private void detach_PropTypeBySports(PropTypeBySport entity)
 {
     this.SendPropertyChanging();
     entity.PropType = null;
 }
 private void attach_PropTypeBySports(PropTypeBySport entity)
 {
     this.SendPropertyChanging();
     entity.PropType = this;
 }
 partial void UpdatePropTypeBySport(PropTypeBySport instance);
 partial void DeletePropTypeBySport(PropTypeBySport instance);
 partial void InsertPropTypeBySport(PropTypeBySport instance);