My C# project developed in VS2015 used Code Contracts. This tool has gone stale since being open sourced by Microsoft and I don't plan to use it in VS2017. That said, when I attempt to run my project's unit tests in VS2017 it complains about the assembly needing to be rewritten using CCRewrite because it contains preconditions. When I create a new VS2017 project (as a test) with preconditions I do not get this error.
What do I need to do to get rid of the error message in my legacy project?