Method not found: '!!0[] System.Array.Empty()'

Sorry for being late to the party, but in case someone else gets this problem via a TeamCity build, I can describe what we had to do.

.NET 4.6 was installed on our build server (but not on the application server), and the RunnerType was Visual Studio (sln) and the Visual Studio option was set to 2015.

This forced the build to use 4.6, and I needed to change the Visual Studio option to 2013 to force the build to use 4.5.2

I had this situation on the production server while on development machine everything was OK.

Installing .NET Framework 4.6 on the target machine has fixed the problem.