Project, create new folder Resources
Project, Properties: Build Events, Pre-Build event command line
echo %date% %time% > "$(ProjectDir)\Resources\BuildDate.txt"
Build your Project
Project, Resources: Create Default Resources File
..Add Resource, Existing File, …\Resources\BuildDate.txt
To read the build date, e.g. in a controller
protected override IAsyncResult BeginExecute(RequestContext requestContext, AsyncCallback callback, object state) { ViewBag.BuildDate = Properties.Resources.BuildDate; ...