you can add the assembly if it available in GAC like below code
"frameworks": {
"aspnet50": {
"frameworkAssemblies": {
"Stimulsoft.Report": ""
}
}
}
in the second part, you can give the version and type of the assembly
One workaround is to create a class library project with your 3rd party library reference. Then use a project reference from your website to the class library project.
Edit: Use a traditional class library, not an ASP.Net 5 class library.
Also:
(1) Package
your assembly with nuget
(2) Follow the @AndersNS answer
talking about nuget repository