private void tsbChange_Click(object sender, System.EventArgs e)
 {
     AccountHouseHolder currentAccountHouseHolder = this.GetCurrentAccountHouseHolder();
     if (currentAccountHouseHolder == AccountHouseHolder.Null)
     {
         System.Windows.Forms.MessageBox.Show("Выберите элемент для изменения");
     }
     else
     {
         AccountHouseHolderHistoryAddChangeForm form = new AccountHouseHolderHistoryAddChangeForm(currentAccountHouseHolder);
         form.ShowDialog(this);
         if (form.DialogResult == System.Windows.Forms.DialogResult.OK)
         {
             currentAccountHouseHolder.SaveChanges();
             this.UpdateAccountHouseHolderHistory();
         }
     }
 }
 private void tsbAdd_Click(object sender, System.EventArgs e)
 {
     AccountHouseHolder accountHouseHolder = new AccountHouseHolder {
         AccountId = this.m_accountId
     };
     AccountHouseHolderHistoryAddChangeForm form = new AccountHouseHolderHistoryAddChangeForm(accountHouseHolder);
     form.ShowDialog(this);
     if (form.DialogResult == System.Windows.Forms.DialogResult.OK)
     {
         accountHouseHolder.SaveChanges();
         this.UpdateAccountHouseHolderHistory();
     }
 }