Problems creating .NET Core 1.1 Web Application

Question

I am having issues creating a .NET Core 1.1 Web Application. I've found postings outlining similar issues other people have had, but they either have a slightly different issue, or have an accepted answer that didn't work for me, or that doesn't have enough details for me to actually implement. I'm going to post step-by-step what I have installed and what I'm doing to create the application, and hopefully someone can tell me what I'm doing wrong.

I have Microsoft Visual Studio Professional 2015 with Update 3 installed:

I've installed the .NET Core 1.1 SDK:

I’ve also installed the tools (Preview 2) for .NET Core 1.1 for Visual Studio 2015:

I opened Visual Studio 2015 and created a new Web API project targeting .NET Core:

I modified the solution's global.json to target .NET Core 1.1:

I modified the project.json to target .NET Core 1.1:

I ran Update-Package in the package manager console:

I ran "dotnet restore" in the package manager console:

And here I can see things going wrong...I'm getting a bunch of "Unable to resolve" errors...which, of course, means my subsequent "dotnet build" action fails:

So...why is it failing to find the dependencies. And/or, what exactly do I do to fix this? Any help would be appreciated.

Lukasz Mk · Accepted Answer · 2017-01-25 16:10:55Z

1

1. Check if you have installed SDK for both x86 and x64 - in other words check both Program Files and Program Files (x86).

From my experience, you need them both - and don't ask me why because I don't know.

2. Check your configuration of NuGet manager - I'm using two sources and everything works fine for me (probably first one is enough):

NuGet.org: https://api.nuget.org/v3/index.json
AspNetCore: https://dotnet.myget.org/f/aspnetcore-master/api/v3/index.json

3. Clean up your Temp folder and NuGet cache folders:

c:\Users\ ?? \.nuget\packages\
c:\Users\ ?? \AppData\Local\NuGet\

4. You can edit project.json file manually and then run Restore packages (right click on References).

Here is my working configuration (you can just copy-paste it into your project.json):

  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.1.0",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.1.0",
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.1.0",
    "Microsoft.AspNetCore.Mvc": "1.1.0",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.1.0-preview4-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Routing": "1.1.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
    "Microsoft.AspNetCore.StaticFiles": "1.1.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0",
    "Microsoft.Extensions.Configuration.Json": "1.1.0",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.1.0",
    "Microsoft.Extensions.Logging": "1.1.0",
    "Microsoft.Extensions.Logging.Console": "1.1.0",
    "Microsoft.Extensions.Logging.Debug": "1.1.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.1.0-preview4-final",
      "type": "build"
    },
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
      "version": "1.1.0-preview4-final",
      "type": "build"
    }
  },

  "tools": {
    "BundlerMinifier.Core": "2.2.306",
    "Microsoft.AspNetCore.Razor.Tools": "1.1.0-preview4-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.1.0-preview4-final",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.1.0-preview4-final",
      "imports": [
        "portable-net45+win8"
      ]
    }
  },

  "frameworks": {
    "netcoreapp1.1": {
      "imports": [
        "dotnet5.6",
        "portable-net45+win8"
      ]
    }
  },

edited Jan 25, 2017 at 16:10

answered Jan 25, 2017 at 15:34

Lukasz Mk

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4 Comments

jceddy Over a year ago

Quick update: I had previously only installed the SDK for x64. Installing it for x86 as well does not fix the issue.

Lukasz Mk Over a year ago

do all steps ;) I had similar problem a few days ago and clearing the NuGet cache was the solution in my case.

Lukasz Mk Over a year ago

In the meantime I have added my working configuration as an example, please refer it.

jceddy Over a year ago

I was missing those entries in my NuGet manager, after adding those I am down to one error left that doesn't have to do with resolving dependencies, which is a call to IApplicationBuilder.UserBrowserLink(). I don't actually use this and removing it allows my app to build. Thanks for the help!

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