private void CadastrarTaxa()
        {
            WTaxaCadastro taxaCadastro = new WTaxaCadastro();
            taxaCadastro.Owner = this;
            taxaCadastro.ShowDialog();

            if (!taxaCadastro.Cancelou)
                ListarTaxas();
        }
        private void EditarTaxa(Contrato.Taxa taxa)
        {
            WTaxaCadastro taxaCadastro = new WTaxaCadastro();
            taxaCadastro.Taxa = taxa;
            taxaCadastro.ShowDialog();

            if (!taxaCadastro.Cancelou)
                ListarTaxas();
        }