XML : Append one XML to another

Currently I need to append two XML files together, without adding new elements to the structure. I have two dataset and need to return one XML with the results of both of them

So, for example I have:

  <Accounts>     <Account>     <Name> Dmmy </Name>     </Account>  </Accounts>    

And

  <Books>    <Book>      <Type> asd </Type>    <Book>  </Books>    

And the result must be something like this :

  <Accounts>     <Account>     <Name> Dmmy </Name>     </Account>  </Accounts>  <Books>    <Book>      <Type> asd </Type>    <Book>  </Books>    

I'm with VS2010 and using Vb.net. Any ideas how Can i make this?

Thanks