Problem nach der Aktualisierung von ASP.NET Core 1.0 auf 1.1

Question

Im Anschluss an diese Official ASP.NET Article habe ich von ASP.NET Core 1.0 auf 1.1 aktualisiert. Aber wenn mein ASP.NET Core-Projekt kompilieren bekomme ich die folgenden Fehler in AccountController.cs Datei:

Fehler:

The call is ambiguous between the following methods or properties: 'System.Security.Claims.PrincipalExtensions.FindFirstValue(System.Security.Claims.ClaimsPrincipal, string)' and 'System.Security.Claims.PrincipalExtensions.FindFirstValue(System.Security.Claims.ClaimsPrincipal, string)' 

Der Fehler bei folgenden in Zeile ist var email = info.Principal.FindFirstValue(ClaimTypes.Email); am Ende der folgenden Aktionsmethode :

public async Task<IActionResult> ExternalLoginCallback(string returnUrl = null, string remoteError = null) 
     { 
      if (remoteError != null) 
      { 
       ModelState.AddModelError(string.Empty, $"Error from external provider: {remoteError}"); 
       return View(nameof(Login)); 
      } 
      var info = await _signInManager.GetExternalLoginInfoAsync(); 
      if (info == null) 
      { 
       return RedirectToAction(nameof(Login)); 
      } 

      // Sign in the user with this external login provider if the user already has a login. 
      var result = await _signInManager.ExternalLoginSignInAsync(info.LoginProvider, info.ProviderKey, isPersistent: false); 
      if (result.Succeeded) 
      { 
       _logger.LogInformation(5, "User logged in with {Name} provider.", info.LoginProvider); 
       return RedirectToLocal(returnUrl); 
      } 
      if (result.RequiresTwoFactor) 
      { 
       return RedirectToAction(nameof(SendCode), new { ReturnUrl = returnUrl }); 
      } 
      if (result.IsLockedOut) 
      { 
       return View("Lockout"); 
      } 
      else 
      { 
       // If the user does not have an account, then ask the user to create an account. 
       ViewData["ReturnUrl"] = returnUrl; 
       ViewData["LoginProvider"] = info.LoginProvider; 
       var email = info.Principal.FindFirstValue(ClaimTypes.Email); 
       return View("ExternalLoginConfirmation", new ExternalLoginConfirmationViewModel { Email = email }); 
      } 
     } 

project.json:

{ 
    "userSecretsId": "aspnet-ABCTest-6af8ade3-87ff-4468-a9ce-8bb69c696ab8", 

    "dependencies": { 
    "Microsoft.NETCore.App": { 
     "version": "1.1.0", 
     "type": "platform" 
    }, 
    "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-final", 
    "Microsoft.EntityFrameworkCore.SqlServer": "1.1.0", 
    "Microsoft.EntityFrameworkCore.Tools": "1.1.0-preview4-final", 
    "Microsoft.AspNetCore.Mvc": "1.1.0", 
    "Microsoft.AspNetCore.Mvc.Core": "1.1.0", 
    "Microsoft.AspNetCore.Server.Kestrel": "1.1.0", 
    "Microsoft.EntityFrameworkCore.SqlServer.Design": "1.1.0", 
    "Microsoft.AspNetCore.Authentication.Cookies": "1.1.0", 
    "Microsoft.AspNetCore.Diagnostics": "1.1.0", 
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.1.0", 
    "Microsoft.AspNetCore.Identity": "1.1.0", 
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.1.0", 
    "Microsoft.AspNetCore.Razor.Tools": "1.1.0-preview4-final", 
    "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0", 
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.1.0-preview4-final", 
    "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": "14.1.0", 
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": "1.1.0-preview4-final", 
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": "1.1.0-preview4-final" }, 

    "tools": { 
    "BundlerMinifier.Core": "2.0.238" }, 

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

    "buildOptions": { 
    "emitEntryPoint": true, 
    "preserveCompilationContext": true 
    }, 

    "runtimeOptions": { 
    "configProperties": { 
     "System.GC.Server": true 
    } 
    }, 

    "publishOptions": { 
    "include": [ 
     "wwwroot", 
     "Views", 
     "Areas/**/Views", 
     "appsettings.json", 
     "web.config" 
    ] 
    }, 

    "scripts": { 
    "prepublish": [ "bower install", "dotnet bundle" ], 
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ] 
    } 
} 

Answer 1

Versuchen Sie, "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-final" aus Ihren Abhängigkeiten zu entfernen. Mischen von Paketen aus verschiedenen Releases - in diesem Fall sind vor RTM und 1.1.0 in der Regel die Ursache für eine solche API-Mehrdeutigkeit.