Csharp try 使用XML to LINQ以正确的排序顺序将新元素添加到XML中

我正在try 向一个XML文件添加一些条目:

   foreach(var talkNumber in listNumbers)
   {
       var newElem = new XElement("PublicTalk",
                               new XAttribute("Number", talkNumber),
                               new XAttribute("Excluded", false),
                               new XAttribute("ExcludedFromDate", "1900-01-01"),
                               new XAttribute("Note", ""),
                               new XAttribute("TimesHeard", 0),
                               new XAttribute("LastHeard", "1900-01-01")
                              );
       ptLangInfo.Add(newElem);
   }

XML

<?xml version="1.0" encoding="utf-8"?>
<PublicTalkTitles>
  <!-- English -->
  <eng>
    <PublicTalk Number="21" Excluded="false" ExcludedFromDate="1900-01-01" Note="" TimesHeard="1" LastHeard="2023-10-15" />
    <PublicTalk Number="1" Excluded="false" ExcludedFromDate="1900-01-01" Note="" TimesHeard="0" LastHeard="1900-01-01" />
    <PublicTalk Number="2" Excluded="false" ExcludedFromDate="1900-01-01" Note="" TimesHeard="0" LastHeard="1900-01-01" />
    <PublicTalk Number="3" Excluded="false" ExcludedFromDate="1900-01-01" Note="" TimesHeard="0" LastHeard="1900-01-01" />
  </eng>
</PublicTalkTitles>

如您所见，问题是我想以正确的数字顺序将这些新项添加到现有项中.它们被添加到底部.

在我的代码片段中，ptLangInfo是eng元素.