private void buttonExport_Click(object sender, System.EventArgs e) { SaveFileDialog a = new SaveFileDialog() { //Filter = "All supported formats|*.png;*.rwtex|PNG Files|*.png|RWTEX Files|*.rwtex", Filter = "RWTEX Files|*.rwtex", FileName = Path.ChangeExtension(asset.AHDR.ADBG.assetName, ".rwtex") }; if (a.ShowDialog() == DialogResult.OK) { //if (Path.GetExtension(a.FileName).ToLower() == ".rwtex") ArchiveEditorFunctions.ExportSingleTextureToRWTEX(asset.Data, a.FileName); //else // MessageBox.Show("Unsupported"); } }