写入表单结束事件的文本文件

我正在尝试将一些字符串写入formclosing事件上的文本文件。问题是编写器没有写任何东西，只是写了一个空白的石板。我有2个不同的文本文件，第一个将记录所有图形数据，第二个文本文件将记录与我的应用程序相关的几个首选项。我的代码如下所示：关闭事件和单独的主力方法：

I am trying to write some strings to a text file on the formclosing event. The problem is that the streamwriter doesn't write anything, it just writes a blank slate. I have 2 different text files, the first one will log all of the graph data and the second text file will log a couple of preferences relevant to my application. My code is shown below for both the closing event and a seperate workhorse method:

  private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {


        if (e.CloseReason.Equals(CloseReason.WindowsShutDown) || (e.CloseReason.Equals(CloseReason.UserClosing))) 
        {
            if (MessageBox.Show("You are closing this application.\n\nAre you sure you wish to exit ?", "Warning: Not Submitted", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Stop) == DialogResult.Yes)
            {

                writeContents("Interrupted");

                return;
            }

            else
                e.Cancel = true; 
        } 



    }

    private void writeContents(string status)
    {

        //---writes the graph data-----
        TextWriter twBackupData = new StreamWriter("C://springTestBackupData.txt");

        twBackupData.WriteLine("--Cycle#-- --TorqueLower-- --TorqueUpper--");

        //writes the table of values in there, assume x and y are the same size arrays
        for(int i = 0; i < x.Count; i++)
        {               
            twBackupData.WriteLine(x[i] + "   " + y_lower[i] + "   " + y_upper[i]);
        }


        //---writes some of the preferences------
        TextWriter twBackupDataInfo = new StreamWriter("C://springTestBackupInfo.txt");

        twBackupDataInfo.WriteLine(status);
        twBackupDataInfo.WriteLine(cycleCount.ToString());
        twBackupDataInfo.WriteLine(section.ToString());
        twBackupDataInfo.WriteLine(revsPerCycle.ToString());
        twBackupDataInfo.WriteLine(preturns.ToString());
        twBackupDataInfo.WriteLine(direction.ToString());

    }

如果您可以提供建议或帮助我找出原因写空白我会非常感激。谢谢！

If you can provide advice or help me find out why it's writing blanks I would greatly appreciate it. Thank you!