CppCxHelper (nuget): You can treat Windows::Foundation::DateTime/TimeSpan (and C/C++ types) more easily. You can also treat Win32 POINT, SIZE, RECT when define USE_WIN32_INTEROP.  If you use ~Reference classes, include mnhelper.h.
Keywords: WinRT|Windows|WindowsClient|WindowsPhone|mntone|8.1|C++/CX|Helper