Swapping two elements and its sub-elements in a xml file using linq to xml

Question

I have a xml file whose few tags I need to swap. Eg: In below sample, i want to swap elements (B and C along with its sub-elements) and update it back to the same xml.

<A>
   <B>
      <xxx>
      <zzz>
      .
   </B>
   <C>
      <nnn>
      <mmm>
      .
   </C>
</A>

so finally it should be something like below.

<A>
   <C>
      <nnn>
      <mmm>
      .
   </C>
   <B>
      <xxx>
      <zzz>
      .
   </B>
</A>

Any help in reading + parsing + saving-back xml ?

Answer 1

Sorry about the VB. The code to create the test XML will not be the same but the code to move A after C should be close.

        Dim xe As XElement
        ' to load from a file - similar to C#
        ' Dim yourpath As String = "your path here"
        'xe = XElement.Load(yourpath)

        ' for testing
        xe = <A>
                 <B>
                     <xxx></xxx>
                     <zzz></zzz>
      b stuff
   </B>
                 <C>
                     <nnn></nnn>
                     <mmm></mmm>
      c stuff
   </C>
             </A>


        'this should be close to what the C# will look like
        Dim holdB As XElement = New XElement(xe.<B>.FirstOrDefault) 'create copy of the B element
        xe.<B>.Remove() 'remove B

        xe.<C>.FirstOrDefault.AddAfterSelf(holdB) 'add after C

        ' to save file - similar to C#
        ' xe.Save(yourpath)

edit: Converted parts

XElement xe = default(XElement);
// to load from a file - similar to C#
string yourpath = "your path here";
xe = XElement.Load(yourpath);

XElement holdB = new XElement(xe.FirstOrDefault);
//create copy of the B element
xe.Remove();
//remove B

xe.FirstOrDefault.AddAfterSelf(holdB);
//add after C

// to save file - similar to C#
xe.Save(yourpath);

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