Error Upgrading from ASP.NET 5 Beta 4 to Beta 5

I have followed the steps here to upgrade from ASP.NET 5 Beta 4 to Beta 5 but am getting an error at runtime when calling application.UseBrowserLink();:

An exception of type ‘System.TypeLoadException’ occurred in
mscorlib.dll but was not handled in user code

Additional information: Could not load type
‘Microsoft.AspNet.Builder.IApplicationBuilder’ from assembly
‘Microsoft.AspNet.Http, Version=, Culture=neutral,

These are the steps I followed:

  1. Had VS 2015 RC already installed.
  2. From PowerShell run:
  3. From PowerShell run: dnvm upgrade
  4. Added a Global.json file (I did not already have one). When I added it, it referred to Beta 5 already:

        "projects": [ "Source", "Tests" ],
        "sdk": {
            "version": "1.0.0-beta5-12103"
  5. Updated all packages in project.json to Beta 5. You can see a full version of my project.lock.json file here.

      "dependencies": {
        "Boilerplate.Web.Mvc6": "1.0.2",
        "Microsoft.AspNet.Diagnostics": "1.0.0-beta5",
        "Microsoft.AspNet.Mvc": "6.0.0-beta5",
        "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta5",
        "Microsoft.AspNet.Mvc.Xml": "6.0.0-beta5",
        "Microsoft.AspNet.Server.IIS": "1.0.0-beta5",
        "Microsoft.AspNet.Server.WebListener": "1.0.0-beta5",
        "Microsoft.AspNet.StaticFiles": "1.0.0-beta5",
        "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta5",
        "Microsoft.Framework.CodeGenerators.Mvc": "1.0.0-beta5",
        "Microsoft.Framework.Configuration.EnvironmentVariables": "1.0.0-beta5",
        "Microsoft.Framework.Configuration.Json": "1.0.0-beta5",
        "Microsoft.Framework.Configuration.UserSecrets": "1.0.0-beta5",
        "Microsoft.Framework.Logging": "1.0.0-beta5",
        "Microsoft.Framework.Logging.Console": "1.0.0-beta5",
        "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta5",
        "Newtonsoft.Json": "6.0.6",
        "System.Runtime": "4.0.20-beta-23019"
      "frameworks": {
          "dnx451": {
            "frameworkAssemblies": {
              "System.Net.Http": "",
              "System.ServiceModel": ""
          "dnxcore50": {
            "dependencies": {
              "System.Net.Http": "4.0.0-beta-23019"
  6. The instructions then go on to say you should run the following commands but I believe VS 2015 RC does this for you dnu restore then dnu build.

Source: .net

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.