How to compile a Visual Studio 2015 project under VY2010?

Question

C++ / C#

There is a C# project written in VC15. How to build it with VC10 compatibility?

Answer 1

1) make sure that all dependencies have versions for .net 4.0 or lower
2) redo those places in the code that use C # > 4.0 features
3) change the version of the target .net framework to 4.0 in the project properties