I have a VS 10 project using .Net 4.0 and I use a lot of things that require 4.0. I created the VS Setup project, adding the main output from my project and built it. Then I installed it, and everything worked fine. In a few days, I am ready to make a new assembly to rebuild my project, and then the installation project. Now when I start msi, it tells me that the .NET Framework 4.0 is required .... I decided that I screwed up, so I just create a new installation project, and it works fine. But again after a few days (restarted VS there, perhaps, and perhaps even on the computer) I rebuild and get an error message indicating that .Net 4.0 is required. I did this several times to check, and this happens sequentially, and I can’t understand why.
The project that I create and install has a Windows service that installs as a startup project. I will switch this to the console object of the application for local testing, and also build and test the project (and not the installation project). This is the only thing I can think about that it can affect the assembly, but again, I can not understand why.
Any help is appreciated.
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