求个xslt

Question

<?xml version="1.0" encoding="utf-8" ?>
<projects>
  <project name="project1">
    <Item name="default.cs">
      <line>line1</line>
      <line>line2</line>
    </Item>
    <Item name="default.txt">
      <line>line3</line>
    </Item>
</project>
 </projects>
========================================================
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <ItemGroup>
    <Content Include="default.cs" />
    <Content Include="default.txt" />
  </ItemGroup>
</Project>
请问怎样通过一个xslt将上面的xml转换成下面的xml？谢谢