<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<Files Include="File1.cs;File2.cs;File3.cs" />
</ItemGroup>
<Target Name="TouchFiles">
<Touch
Files="@(Files)">
<Output
TaskParameter="TouchedFiles"
ItemName="FilesTouched"/>
</Touch>
</Target>
</Project>