private void Model_BankAccountChanged(object sender, BankAccountsEventArgs e)
{
Int32 index = BankAccounts.IndexOf(BankAccounts.FirstOrDefault(bankacc => bankacc.ID == e.BankAccountsId));
BankAccounts.RemoveAt(index);
BankAccounts.Insert(index, _model.BankAccounts[index]);
SelectedBankAccount = BankAccounts[index];
}