<main>
  <myself>
    <pid>1</pid>
    <name>abc</name>
  </myself>
  <myself>
    <pid>2</pid>
    <name>efg</name>
  </myself>
</main>

that is my XML file named simpan. I have two button. next and previous. What i want to do is, all the info will shows off on the TextBox when the user click the button. The searching node will be based on the pid.

Next button will adding 1 value of pid (let's say pid=2) and it will search on the node that have the same value of pid=2. it also will show the name for the pid=2. (showing name=abc)

Same goes to the previous button where it will reduce 1value of pid (pid=1).

Does anybody knows how to do this?

//-------------EDIT------------------

thanks to L.B, im trying to use his code. however i got an error.

is my implementation of code correct?

private void previousList_Click(object sender, EventArgs e)
    {
        pid = 14;

        XDocument xDoc = XDocument.Parse("C:\\Users\\HDAdmin\\Documents\\Fatty\\SliceEngine\\SliceEngine\\bin\\Debug\\simpan.xml");

        var name = xDoc.Descendants("myself")
                    .First(m => (int)m.Element("PatientID") == pid)
                    .Value;

        textETA.Text = name;
        ////////////////////


    }