Your project is not referencing the ".NETPortable,Version=v4.5,Profile=Profile259" framework. Add a reference to ".NETPortable,Version=v4.5,Profile=Profile259" in the "frameworks" section of your proj
i want to add nuget packages to my portable class library project ,
then i add a project.json to my portable class library project ,but vs 2017 build failed, error message is following:
Your project is not referencing the ".NETPortable,Version=v4.5,Profile=Profile259" framework.
Add a reference to ".NETPortable,Version=v4.5,Profile=Profile259" in the "frameworks" section of your project.json,
and then re-run NuGet restore.
so ,i search from bing, i got a post:
https://forums.xamarin.com/discussion/80045/error-using-nuget
then i add following json to project.json file:
".NETPortable,Version=v4.5,Profile=Profile259": {}
and keep only ".NETPortable,Version=v4.5,Profile=Profile259": {}" under "frameworks" node,like this:
{ "dependencies": { "Portable.MvvmLightLibs": "5.0.2" }, "frameworks": { ".NETPortable,Version=v4.5,Profile=Profile259": {} }, "runtimes": { "win": {} } }
then,i build my project again,it success!