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            using (SaveFileDialog dialog = new SaveFileDialog())
            {
                dialog.Filter = "CSV|*.csv|Textdatei|*.txt";
                dialog.InitialDirectory = Environment.CurrentDirectory;
                textbox5.Text = openFileDialog2.FileName
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    try
                    {
                        File.Create(textbox5.Text);                 
                        MessageBox.Show("Die CSV-Datei wurde erfolgreich erstellt");
                    }
                    catch (System.Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                }
            }