『C#』 中创建文件的存储路径有关问题!高手快来

『C#』 中创建文件的存储路径问题!!!急急急！！！高手快来！
private void button1_Click(object sender, EventArgs e)
  {
  string path = "";
  if(folderBrowserDialog1.ShowDialog()==DialogResult.OK)
  {
  folderBrowserDialog1.ShowNewFolderButton = true;
  path=folderBrowserDialog1.SelectedPath;
  FileStream aFile = new FileStream("Log.txt", FileMode.OpenOrCreate);
  StreamWriter sw = new StreamWriter(aFile);

  bool truth = true;
  // Write data to file.
  sw.WriteLine("Hello to you.");
  sw.WriteLine("It is now {0} and things are looking good.",
  DateTime.Now.ToLongDateString());
  sw.Write("More than that,");
  sw.Write(" it's {0} that C# is fun.", truth);
  sw.Close();
  }
  }

先创建一个文件夹。
然后创建一个txt文件，Log.txt，想把该文件放在创建的那个文件夹中，可是系统默认放在文件夹debug中,怎么办啊！
高手们，请赐教，我是菜鸟，不吝惜分数！～

[解决办法]
= =，刚发完贴，就解决了，2啊！～