SaveFile c#

SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                using (Stream s = File.Open(saveFileDialog1.FileName, FileMode.CreateNew))
                using (StreamWriter sw = new StreamWriter(s))
                {
                    sw.Write(fastColoredTextBox1.Text);
                }
            }