First paste of xml code

<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
    <UsingTask TaskName="GetNewestFiles" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll">
    <ParameterGroup>
		<Path ParameterType="System.String" Required="true" />
		<FileFilter ParameterType="System.String" Required="true" />
		<HowManyFiles ParameterType="System.Int32" Required="true" />
		<FilesToCopy ParameterType="System.String[]" Output="true" />
    </ParameterGroup>
    <Task>
      <Code Type="Fragment" Language="cs"><![CDATA[

DirectoryInfo info = new DirectoryInfo(Path);
FilesToCopy = info.GetFiles(FileFilter)
.OrderByDescending(p => p.CreationTime)
.Select(f =>System.IO.Path.Combine(Path,f.Name)).Take(HowManyFiles).ToArray();

]]></Code>
    </Task>
  </UsingTask>

  <Target Name='Demo' >
    <GetNewestFiles Path="d:\temp" FileFilter="*" HowManyFiles="3">
		<Output TaskParameter="FilesToCopy" ItemName="FilesToCopy"/>
	</GetNewestFiles>
	
	<!-- Copy only these files -->
	<Message Text ="Newst Files @(FilesToCopy)" />
	<Copy
            SourceFiles="@(FilesToCopy)"
            DestinationFolder="d:\temp\msbuild\Destination"
        />
	<Message Text ="Newest Files as string @(FilesToCopy->'%(filename)%(extension)',' ')" />
  </Target>
</Project>