When I upgrade framework section to:
\"frameworks\": {
\"netcoreapp1.1\": {
\"dependencies\": {
},
\"imports\": \"dnxcore50\"
}
}
If you are dealing with csproj files you can edit them and add this line:
The result should look like this:
This is how VS converter does it when it upgrades project.json to csproj. If you need other targets, you can play around converting your project.json files to csproj files and see the output.