VS2017: E0135 namespace “std” has no member “filesystem”
A couple of options to investigate. Check the language standard. You need C++17 or above: If your version of visual studio doesn’t support std::filesystem yet, you can try std::experimental::filesystem. I have the following version and std::filesystem works (with the C++17 language selection shown above): Microsoft Visual Studio Community 2017 Preview Version 15.8.0 Preview 1.1 VisualStudio.15.Preview/15.8.0-pre.1.1+27705.2000