partial void DeleteCustomerCustomerDemo(CustomerCustomerDemo instance);
 partial void UpdateCustomerCustomerDemo(CustomerCustomerDemo instance);
 private void detach_CustomerCustomerDemos(CustomerCustomerDemo entity)
 {
     this.SendPropertyChanging();
     entity.Customer = null;
 }
 partial void InsertCustomerCustomerDemo(CustomerCustomerDemo instance);
 private void attach_CustomerCustomerDemos(CustomerCustomerDemo entity)
 {
     this.SendPropertyChanging();
     entity.CustomerDemographic = this;
 }