private void ExportCSVToolStripMenuItem_Click(object sender, EventArgs e) { if (GVCampaign.DataSource == null) { return; } SaveFileDialog dialog = new SaveFileDialog() { FileName = "remnant_export", DefaultExt = ".csv", InitialDirectory = Directory.GetCurrentDirectory() }; DialogResult result = dialog.ShowDialog(); if (result == DialogResult.OK) { _viewModel.ExportCSV(dialog.FileName, GVCampaign.DataSource as DataTable); } }