private void Form1_Load(object sender, EventArgs e)
{
ContaDAO contaDAO = new ContaDAO(FabricaConexao.ObterConexao());
List <Conta> contas = contaDAO.obterContas();
bindingSourceOrigem.DataSource = contas;
bindingSourceDestino.DataSource = new List <Conta>(contas);
cbOrigem.DataSource = bindingSourceOrigem.DataSource;
cbDestino.DataSource = bindingSourceDestino.DataSource;
}
