.Net, Server 2008, Visual Studio Solved: Error when deploying a .Net 4.0 project (that was downgraded from .Net 4.5) to a .Net 4.0 server I recently had to downgrade a .Net 4.5 project to .Net 4.0 so that it could run on MS Server 2003. I had many warnings June 25, 2013December 12, 2020 by Jacqui2 Min Reading