I had the same problem and I found a solution on another site . Here are the steps you need to complete:
cd C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE
- :
devenv/installvstemplates
, .
VS 2015, (Package), , , . . -, File Directory System.IO . :
CS0234 "" "System.IO" ( ?)
MyProject.DNX Core 5.0...
System.IO :
string DataPath = System.IO.Directory.GetCurrentDirectory();
- DNX Core 5.0, ASP. , Console Application (Package) New Project Templates/Visual #/Web.
, , , , , , "CS0234". "" ... ", Console Application (Package), , , , , . " " " /Visual #", , .
" " :

, . , " " , - . , , , "".
, Visual #, New Project, . . , edit.
, , Visual Studio 2015, . , , / Microsoft Visual Studio :

. , ?