How to correctly open a FileStream for usage with an XDocument

问题

I want to append some nodes to an xml document using Linq2XML. The file in question is being used by other processes and they should be able to read the file while I update it. So I came up with this solution, which obviously isn't the correct way (The method doc.Save() fails and says that another process is using the file):

using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.Read))
{
  doc = XDocument.Load(new StreamReader(fs));
  doc.Root.Add(entry);
  doc.Save(filename);
  fs.Close();
}

Any help is greatly appreceated.

回答1:

Load the document, close the stream, save it again. That also means you can open it in a simpler way :)

XDocument doc;

using (StreamReader reader = File.OpenText(filename))
{
  doc = XDocument.Load(reader);
  doc.Root.Add(entry);
}

doc.Save(filename);

来源：https://stackoverflow.com/questions/277783/how-to-correctly-open-a-filestream-for-usage-with-an-xdocument