title: Prevent app from crashing if the file is already when saving to a .csv
body: <p>I currently have the code below to save some data to a .csv file. Everything works properly, but the one problem I am having is if the .csv file is open, and you try to save a new set of data the app crashes. I think making it a read only will prevent this problem, but i am not sure how to do that. For example. if the last file is saved at C:\Users\Documents\data.csv, and the user has that data.csv file open. Then the user saves another set of data using the same path, the app then crashes.</p>
  
  <pre><code>SaveFileDialog saveFileDialog = new SaveFileDialog();
  saveFileDialog.FileName = tbSave.Text;
  saveFileDialog.Filter = ".csv|*.csv";
  if(saveFileDialog.ShowDialog() == DialogResult.OK)
  {
      File.WriteAllText(saveFileDialog.FileName, sb.ToString());
      MessageBox.Show("Save Complete!" + "\n" + "Number of skips recorded: " + skips.ToString() + "\n" + "Elasped time recorded (ms): " + time.ToString());
  }
  </code></pre>