private void button2_Click(object sender, RoutedEventArgs e)

        {

            var saveFileDialog1 = new SaveFileDialog

            {

                Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif",

                Title = "Save File"

            };

            saveFileDialog1.ShowDialog();

            if (!string.IsNullOrEmpty(saveFileDialog1.FileName)) return;

            using (var sw = new StreamWriter(saveFileDialog1.FileName))

            {

                sw.Write("Writing Text ");

                sw.WriteLine("Here we go.");

                sw.WriteLine("-------------------");

                sw.Write("Today is is: " + DateTime.Now);

                sw.WriteLine("Done");

            }

        }