private async void AtualizaDataSourcePesquisaAsync()
 {
     using (var oDB = new CContaCorrente.CContaCorrenteClient())
     {
         if (toolStripComboBox1.SelectedItem != null && toolStripTextBox1.Text != "")
         {
             pesquisarCCBindingSource.DataSource = await oDB.SelecionarTodosViewCriterioAsync(toolStripTextBox1.Text, toolStripComboBox1.SelectedItem.ToString());
         }
         if (toolStripTextBox1.Text == "")
         {
             AtualizaDataSourceAsync();
         }
     }
 }