Sorry to bother anyone with this question, but I\'ve been researching this for hours, with no resolution yet:
I am porting a rather massive application to the 10.0 C
for anyone like me that this answer did not ring helpful, a second option is to go to: Project Properties->Configuration Properties->General->Project Defaults->.NET Target Framework Version and set it to v4.0
https://connect.microsoft.com/VisualStudio/feedbackdetail/view/806238/unwarranted-linker-errors-using-stl-filestream-class-in-managed-classes-in-c-11-cli has an obscure answer from Microsoft team that fixed my issue.