upgrade asp.net core targeting framework 4.6.1 from vs2015 to vs2017 - One or more compilation references are missing

Question

I have upgraded my asp.net core,using project.json and targeting .net framework 4.6.1 on visual studio 2015 to visual studio 2017.

I have multiple projects in the solution where the main application is referencing them by project reference(all of them target net461).

When running the application I get

One or more compilation references are missing. Possible causes include a missing 'preserveCompilationContext' property under 'buildOptions' in the application's project.json.

screenshot:

I have tried adding the true to all of the reference projects without luck.

Can anyone help? Thank you.

Answer 1

Look in your Login.cshtml file and ensure you give the fully qualified name to the model to find your LoginViewModel and inject your SignInManager. Something like this:

@model company.Web.Models.AccountViewModels.LoginViewModel

@inject Microsoft.AspNetCore.Identity.SignInManager SignInManager

That should allow the view to serve the page correctly.