private void buttonAddSequence_Click(object sender, EventArgs e) { openFileDialog1.Filter = FileIOHelper.GetOpenFilters(); openFileDialog1.InitialDirectory = Paths.SequencePath; openFileDialog1.FileName = string.Empty; if (openFileDialog1.ShowDialog() != DialogResult.OK) { return; } listBoxSequences.Items.Add(Path.GetFullPath(openFileDialog1.FileName)); }