I'm trying to update an xml file but seem to be having problems. My xml file
is in the following format:
<main>
  <site name="mysite" username="user" password="pass" />
  <site ... />
</main>
The code I have is:
XDocument mydoc =
XDocument.Load(this.txtFilePath.Text,LoadOptions.PreserveWhitespace);

               XElement myElem = mydoc.Elements("site").Where(e => (string)
                   e.Attribute("name") == fieldArray[0]).FirstOrDefault();

               if (myElem == null) Console.WriteLine("myElem is null");

               //myElem.SetAttributeValue("name",this.txtSite.Text);
               myElem.Attribute("name").Value = this.txtSite.Text;
               //myElem.SetAttributeValue("login", this.txtUsername.Text);
               myElem.Attribute("login").Value = this.txtUsername.Text;
               //myElem.SetAttributeValue("password", this.txtPassword.Text);
               myElem.Attribute("password").Value = this.txtPassword.Text;

It doesn't seem to be working. myElem variable seems to be null. Any
suggestions?