Help with my configuration: Could not load file or assembly 'System, Version=4.0.0.0 ...

[guardrex]

Feels like I haven't configured something correctly. This is a CoreCLR project on Win7 x64 with runtime dnx-coreclr-win-x64.1.0.0-beta5-xxxxx. Latest xxxxx is 11760 (5/14).

project.json dependencies

EntityFramework.SqlServer: 7.0.0-beta5-*
EntityFramework.Commands: 7.0.0-beta5-*

project.json commands

"ef": "EntityFramework.Commands"

Startup.cs ConfigureServices

services.AddEntityFramework()
    .AddSqlServer()
    .AddDbContext<DbDbContext>(options => options.UseSqlServer(config.Get("Database")));

Model

namespace MyApp.Models {
    public class DbDbContext : DbContext {

        public DbSet<Test> Tests { get; set; }

        protected override void OnModelCreating(ModelBuilder builder) {
            builder.Entity<Test>().Property(typeof(int), "id").ForSqlServer().UseIdentity();
            base.OnModelCreating(builder);
        }

    }

    public class Test {
        [Key]
        public int id { get; set; }
        public string field1 { get; set; }
        public int field2 { get; set; }
    }
}

Executing from an elevated command line dnx . ef results in ...

System.IO.FileNotFoundException: Could not load file or assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.
File name: 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' ---> System.IO.FileNotFoundException: Could not load the specified file.
File name: 'System'
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyName(AssemblyName assemblyName)
   at System.Runtime.Loader.AssemblyLoadContext.Resolve(IntPtr gchManagedAssemblyLoadContext, AssemblyName assemblyName)
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
   at Microsoft.Data.Entity.Relational.Design.Templating.Compilation.MetadataReferencesProvider.AddDefaultReferences()
   at Microsoft.Data.Entity.Commands.DatabaseTool..ctor(IServiceProvider serviceProvider, ILoggerProvider loggerProvider)
   at Microsoft.Data.Entity.Commands.Program..ctor(IServiceProvider serviceProvider, IApplicationEnvironment appEnv, ILibraryManager libraryManager, IRuntimeEnvironment runtimeEnv)
System.IO.FileNotFoundException: Could not load the specified file.
File name: 'System'
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyName(AssemblyName assemblyName)
   at System.Runtime.Loader.AssemblyLoadContext.Resolve(IntPtr gchManagedAssemblyLoadContext, AssemblyName assemblyName)

[bricelam]

@guardrex could you share your full project.json file?

[guardrex]

Sure ...

{
  "webroot": "wwwroot",
  "version": "1.0.0",
  "authors": [ "XXXXXX" ],
  "description": "XXXXXX",
  "copyright": "XXXXXX",
  "dependencies": {
    "Microsoft.AspNet.Diagnostics": "1.0.0-beta5-*",
    "Microsoft.AspNet.Hosting": "1.0.0-beta5-*",
    "Microsoft.AspNet.Mvc": "6.0.0-beta5-*",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta5-*",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-beta5-*",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta5-*",
    "Microsoft.AspNet.StaticFiles": "1.0.0-beta5-*",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta5-*",
    "Microsoft.Framework.ConfigurationModel": "1.0.0-beta5-*",
    "System.Net.Http": "4.0.0-beta-*",
    "System.Net.Sockets": "4.0.0-beta-*",
    "System.Net.Security": "4.0.0-beta-*",
    "System.ComponentModel.TypeConverter": "4.0.0-beta-*",
    "xunit.runner.aspnet": "2.0.0-aspnet-beta5-*",
    "EntityFramework.SqlServer": "7.0.0-*",
    "EntityFramework.Commands": "7.0.0-*",
    "Microsoft.AspNet.Diagnostics.Entity": "7.0.0-beta4"
  },
  "commands": {
    "web": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.WebListener --server.urls http://localhost:5001",
    "test": "xunit.runner.aspnet",
    "ef": "EntityFramework.Commands"
  },
  "frameworks": {
    "dnxcore50": { }
  },
  "exclude": [
    "wwwroot",
    "node_modules"
  ],
  "publishExclude": [
    "node_modules",
    "gulpfile.js",
    "notes.txt",
    "NuGet.Config",
    "package.json",
    "stylesheets",
    "scripts",
    "obj",
    ".vs",
    "Views_debug",
    "fonts",
    "Properties",
    "**.user"
  ]
}

[guardrex]

@bricelam If it doesn't look simple to repro from my description, I can put together a repo project for you.

[bricelam]

Try updating this line to beta5-*:

"Microsoft.AspNet.Diagnostics.Entity": "7.0.0-beta4"

[guardrex]

I tried both 7.0.0-* and 7.0.0-beta5-*, which gave me the same v.13033 package. Same result ... Could not load file or assembly System, Version 4.0.0.0 ...

[bricelam]

@lajones, This is the issue @davidfowl and I mentioned in your first Templating PR.

[lajones]

Fixed with #2251. Closing.
@guardrex - should be in tonight's build. Give it a try and please re-open if any problems.

[jpwits]

Hi,

the following configuration works for me 👍
"Microsoft.AspNet.Diagnostics": "1.0.0-beta4",
"Microsoft.AspNet.Mvc": "6.0.0-beta4",
"Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta4",
"Microsoft.AspNet.Server.IIS": "1.0.0-beta4",
"Microsoft.AspNet.Server.WebListener": "1.0.0-beta4",
"Microsoft.AspNet.StaticFiles": "1.0.0-beta4",
"Microsoft.AspNet.Tooling.Razor": "1.0.0-beta4",
"Microsoft.AspNet.Authentication.Cookies": "1.0.0-beta4",
"Microsoft.AspNet.Authentication.Facebook": "1.0.0-beta4",
"Microsoft.AspNet.Authentication.Google": "1.0.0-beta4",
"Microsoft.AspNet.Authentication.Twitter": "1.0.0-beta4",
"Microsoft.AspNet.Authentication": "1.0.0-beta4",
"Microsoft.AspNet.WebUtilities": "1.0.0-beta4",
"Microsoft.AspNet.Http": "1.0.0-beta4",
"EntityFramework.SqlServer": "7.0.0-beta4",
"Microsoft.Framework.ConfigurationModel": "1.0.0-beta4",
"Microsoft.Framework.CodeGenerators.Mvc": "1.0.0-beta4",
"Microsoft.AspNet.Authorization": "1.0.0-beta4",
"Microsoft.AspNet.Identity": "3.0.0-beta4",
"Microsoft.AspNet.Identity.EntityFramework": "3.0.0-beta4",
"Microsoft.Framework.Logging": "1.0.0-beta4",
"System.Net.Http": "4.0.0-beta-22816",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta4",
"System.Web.Http.Common": "4.0.20126.16343"

, do anyone have a config for EF latest beta 6...beta 4 gives me a 'Sequence contains more than one element' for any semi-complex query, then I have to break it down or ToList() it to query from there?