creating a SaveFileDialog

private void button1_Click(object sender, System.EventArgs e)
{
  Stream myStream ;
  SaveFileDialog saveFileDialog1 = new SaveFileDialog();

  saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"  ;
  saveFileDialog1.FilterIndex = 2 ;
  saveFileDialog1.RestoreDirectory = true ;

  if(saveFileDialog1.ShowDialog() == DialogResult.OK)
  {
      if((myStream = saveFileDialog1.OpenFile()) != null)
      {
          // Code to write the stream goes here.
          myStream.Close();
      }
  }
}

to calculate date time

date Time event and code for calculating day and validate start date nd end date



private void dateTimePickerEnd_ValueChanged(object sender, EventArgs e)
{
dateTimePickerEnd.MinDate = dateTimePickerStart.Value;

DateTime start = DateTime.Parse(dateTimePicker1.Text);
DateTime end = DateTime.Parse(dateTimePicker2.Text);
//dateTimePicker2.MinDate = dateTimePicker1.Value;
if (end.Day >= start.Day)
{
TimeSpan ts = end.Subtract(start);
string ss = ts.TotalDays.ToString();

string s = ts.Days.ToString();
textBox1.Text = (s);
//string time = new DateTime(ts.Ticks);
//MessageBox.Show(time);
}

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