private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
 {
     try
     {
         f_Notepad.richTextBox1.Text = File.ReadAllText(diretorioSave + @"\" + listBox1.SelectedItem.ToString(), Encoding.UTF8);
         f_Notepad.Text = listBox1.SelectedItem.ToString();
         f_Notepad.setRichTextTamanho();
     }
     catch (Exception)
     {
         throw;
     }
 }