Could not load assembly 'Microsoft.Dnx.Runtime.Abstractions'

Question

I have done an upgrade of an Asp.Net Core application from beta 7 to RC1 by following the steps outlined in these two guidelines:

Beta 7 to Beta 8

Beta 8 to RC 1

After the conversion the application compiles, but on startup I get the following exception:

An exception of type 'System.IO.FileNotFoundException' occurred in Microsoft.VisualStudio.Web.BrowserLink.Runtime.dll and wasn't handled before a managed/native boundary

Additional information: Could not load file or assembly 'Microsoft.Dnx.Runtime.Abstractions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.

As can be seen in the screenshot below this exception occurs in UseBrowserLink.

Here is the dependency listing in my project.json file:

"version": "1.0.0-*",

"dependencies": {
   "EntityFramework.Commands": "7.0.0-rc1-final",
   "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final",
   "EntityFramework.MicrosoftSqlServer.Design": "7.0.0-rc1-final",
   "Microsoft.AspNet.Authentication.Cookies": "1.0.0-rc1-final",
   "Microsoft.AspNet.Authentication.Facebook": "1.0.0-rc1-final",
   "Microsoft.AspNet.Authentication.Google": "1.0.0-rc1-final",
   "Microsoft.AspNet.Authentication.MicrosoftAccount": "1.0.0-rc1-final",
   "Microsoft.AspNet.Authentication.Twitter": "1.0.0-rc1-final",
   "Microsoft.AspNet.Diagnostics": "1.0.0-rc1-final",
   "Microsoft.AspNet.Diagnostics.Entity": "7.0.0-rc1-final",
   "Microsoft.AspNet.Identity": "3.0.0-rc1-final",
   "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-final",
   "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
   "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
   "Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
   "Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
   "Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
   "Microsoft.AspNet.Tooling.Razor": "1.0.0-rc1-final",
   "Microsoft.Extensions.Configuration.Abstractions": "1.0.0-rc1-final",
   "Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final",
   "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc1-final",
   "Microsoft.Extensions.Logging": "1.0.0-rc1-final",
   "Microsoft.Extensions.Logging.Console": "1.0.0-rc1-final",
   "Microsoft.Extensions.Logging.Debug": "1.0.0-rc1-final",
   "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc1-final",
   "Microsoft.Dnx.Runtime": "1.0.0-rc1-final"
},

"commands": {
   "web": "Microsoft.AspNet.Server.Kestrel",
   "ef": "EntityFramework.Commands"
},

Does anyone know why I am getting this exception and how I could go about resolving it?

UPDATE:

Here is the output from when I start the application from Visual Studio:

'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'Microsoft.Dnx.Host.Clr'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Dnx.Host.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Extensions.PlatformAbstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Dnx.Loader.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Dnx.ApplicationHost.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Dnx.Runtime.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Dnx.Compilation.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Dnx.Compilation.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Server.Kestrel\1.0.0-rc1-final\lib\dnx451\Microsoft.AspNet.Server.Kestrel.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Hosting\1.0.0-rc1-final\lib\dnx451\Microsoft.AspNet.Hosting.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Configuration\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Configuration.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Configuration.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Configuration.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Configuration.CommandLine\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Configuration.CommandLine.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Configuration.Json\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Configuration.Json.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Configuration.EnvironmentVariables\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Configuration.EnvironmentVariables.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Hosting.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Hosting.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.DependencyInjection.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.DependencyInjection.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Http.Features\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Http.Features.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Hosting.Server.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Hosting.Server.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Primitives\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Primitives.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Configuration.FileExtensions\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Configuration.FileExtensions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.FileProviders.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.FileProviders.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Logging\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Logging.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Logging.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Logging.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.DependencyInjection\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.DependencyInjection.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Http.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Http.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Http\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Http.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\System.Diagnostics.DiagnosticSource\4.0.0-beta-23516\lib\dotnet5.2\System.Diagnostics.DiagnosticSource.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Runtime\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Runtime.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Threading\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Threading.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Diagnostics.Tracing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Diagnostics.Tracing.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.FileProviders.Physical\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.FileProviders.Physical.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc1-final\bin\Microsoft.Dnx.Compilation.DesignTime.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'SubjectChooser'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'Anonymously Hosted DynamicMethods Assembly'. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Configuration.UserSecrets\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Configuration.UserSecrets.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Newtonsoft.Json\6.0.6\lib\net45\Newtonsoft.Json.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Numerics\v4.0_4.0.0.0__b77a5c561934e089\System.Numerics.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.Razor\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.Razor.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.ViewFeatures\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.ViewFeatures.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.Abstractions\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.Core\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.Core.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\EntityFramework.Core\7.0.0-rc1-final\lib\dnx451\EntityFramework.Core.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\EntityFramework.MicrosoftSqlServer\7.0.0-rc1-final\lib\net451\EntityFramework.MicrosoftSqlServer.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Identity.EntityFramework\3.0.0-rc1-final\lib\net451\Microsoft.AspNet.Identity.EntityFramework.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Identity\3.0.0-rc1-final\lib\net451\Microsoft.AspNet.Identity.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.ApiExplorer\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.ApiExplorer.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Razor.Runtime\4.0.0-rc1-final\lib\net451\Microsoft.AspNet.Razor.Runtime.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.DataAnnotations\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.DataAnnotations.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.Formatters.Json\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.Formatters.Json.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.Cors\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.Cors.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.OptionsModel\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.OptionsModel.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Routing\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Routing.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.MemoryPool\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.MemoryPool.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Authorization\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Authorization.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.DataProtection\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.DataProtection.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Antiforgery\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Antiforgery.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.WebEncoders\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.WebEncoders.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Cryptography.Internal\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Cryptography.Internal.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.DataProtection.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.DataProtection.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.WebEncoders.Core\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.WebEncoders.Core.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Mvc.Razor.Host\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Mvc.Razor.Host.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Razor\4.0.0-rc1-final\lib\net451\Microsoft.AspNet.Razor.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Caching.Abstractions\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Caching.Abstractions.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Caching.Memory\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Caching.Memory.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Cors\6.0.0-rc1-final\lib\net451\Microsoft.AspNet.Cors.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Ix-Async\1.2.5\lib\net45\System.Interactive.Async.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Remotion.Linq\2.0.1\lib\net45\Remotion.Linq.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Linq.Expressions\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Linq.Expressions.dll'. Module was built without symbols. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\EntityFramework.Relational\7.0.0-rc1-final\lib\net451\EntityFramework.Relational.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Authentication\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Authentication.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\System.Numerics.Vectors\4.1.1-beta-23516\lib\portable-net45+win8\System.Numerics.Vectors.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Logging.Console\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Logging.Console.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.Extensions.Logging.Debug\1.0.0-rc1-final\lib\net451\Microsoft.Extensions.Logging.Debug.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Diagnostics\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Diagnostics.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.StaticFiles\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.StaticFiles.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Authentication.Facebook\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Authentication.Facebook.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Authentication.OAuth\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Authentication.OAuth.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Authentication.Google\1.0.0-rc1-final\lib\net451\Microsoft.AspNet.Authentication.Google.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.VisualStudio.Web.BrowserLink.Loader\14.0.0-rc1-final\lib\dnx451\Microsoft.VisualStudio.Web.BrowserLink.Loader.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\bruce_000.dnx\packages\Microsoft.AspNet.Diagnostics.Entity\7.0.0-rc1-final\lib\net451\Microsoft.AspNet.Diagnostics.Entity.dll'. Cannot find or open the PDB file. 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Web Tools\Page Inspector\dnx451\Microsoft.VisualStudio.Web.BrowserLink.Runtime.dll'. Cannot find or open the PDB file. Exception thrown: 'System.IO.FileNotFoundException' in Microsoft.VisualStudio.Web.BrowserLink.Runtime.dll 'dnx.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\14.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.dll'.

UPDATE 2:

It seems that somewhere in Visual Studio there is a reference to a beta 7 version of Microsoft.VisualStudio.Web.BrowserLink.Runtime.dll. The file referenced is in C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Web Tools\Page Inspector\dnx451. Here is a screenshot:

How do I go about removing this reference or updating it to RC1?

(1) You should never ever have to reference Microsoft.Dnx.Runtime. The only thing you might need is Microsoft.Extensions.PlatformAbstractions. (2) What dnx version are you using? — Victor Hurdugaci
I only put that in trying to fix this problem. I still get the problem with Microsoft.Dnx.Runtime removed. — BruceHill
When I did "dnvm upgrade" as per the instructions in the guideline the upgrade was done to version 1.0.0-rc1-update1. Under project properties in Visual Studio I have this version selected for Solution DNX SDK version — BruceHill
Can you please run the app from a console (dnx web)? But, before doing that set the environment variable DNX_TRACE = 1. Then share the output with us. — Victor Hurdugaci
It only seems to go wrong inside Visual Studio; dnx web starts without problems. I will copy the output from Visual Studio as an update to the question. — BruceHill

BruceHill BruceHill · Accepted Answer · 2016-03-20T14:21:38

The workaround that I used here was to simply delete the file Microsoft.VisualStudio.Web.BrowserLink.Runtime.dll that was being referenced by Visual Studio. When the file was gone the exception did not appear. Not the ideal solution but it solved the problem for me.

Could not load assembly 'Microsoft.Dnx.Runtime.Abstractions'

2 Answers