title: Could not load file or assembly 'Microsoft.IdentityModel.Protocols.WsFederation,
body: <p>I am having this error ONLY after I added the assembly line on the startup.cs</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Web;
  using Microsoft.Owin;
  using Owin;
  
  [assembly: OwinStartupAttribute(typeof(InnovationInABoxWebApi.App_Start.Startup))]
  namespace InnovationInABoxWebApi.App_Start
  {
      public partial class Startup
      {
          public void Configuration(IAppBuilder app)
          {
              ConfigureAuth(app);
          }
      }
  }
  </code></pre>
  
  <p>this is package.json</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;packages&gt;
    &lt;package id="Antlr" version="3.4.1.9004" targetFramework="net45" /&gt;
    &lt;package id="bootstrap" version="3.0.0" targetFramework="net45" /&gt;
    &lt;package id="jQuery" version="1.10.2" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.ApplicationInsights" version="2.2.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.ApplicationInsights.Agent.Intercept" version="2.0.6" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.ApplicationInsights.DependencyCollector" version="2.2.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.ApplicationInsights.PerfCounterCollector" version="2.2.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.ApplicationInsights.Web" version="2.2.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.ApplicationInsights.WindowsServer" version="2.2.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel" version="2.2.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.AspNet.Cors" version="5.2.5" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.AspNet.Mvc" version="5.2.3" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.AspNet.Razor" version="3.2.3" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.AspNet.WebApi" version="5.2.3" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.AspNet.WebApi.Client" version="5.2.5" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.AspNet.WebApi.Core" version="5.2.5" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.AspNet.WebApi.Cors" version="5.2.5" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.AspNet.WebApi.HelpPage" version="5.2.3" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.8" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.IdentityModel.Logging" version="5.2.1" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.IdentityModel.Tokens" version="5.2.1" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.Net.Compilers" version="1.3.2" targetFramework="net45" developmentDependency="true" /&gt;
    &lt;package id="Microsoft.Owin" version="4.0.0" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.Owin.Host.SystemWeb" version="4.0.0" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.Owin.Security" version="4.0.0" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.Owin.Security.ActiveDirectory" version="4.0.0" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.Owin.Security.Jwt" version="4.0.0" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.Owin.Security.OAuth" version="4.0.0" targetFramework="net451" /&gt;
    &lt;package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" /&gt;
    &lt;package id="Modernizr" version="2.6.2" targetFramework="net45" /&gt;
    &lt;package id="Newtonsoft.Json" version="10.0.1" targetFramework="net451" /&gt;
    &lt;package id="Owin" version="1.0" targetFramework="net451" /&gt;
    &lt;package id="Respond" version="1.2.0" targetFramework="net45" /&gt;
    &lt;package id="System.IdentityModel.Tokens.Jwt" version="5.2.1" targetFramework="net451" /&gt;
    &lt;package id="WebGrease" version="1.5.2" targetFramework="net45" /&gt;
  &lt;/packages&gt;
  </code></pre>
  
  <p>Full error</p>
  
  <pre><code>Could not load file or assembly 'Microsoft.IdentityModel.Protocols.WsFederation, Version=5.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. 
    Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
  
   Exception Details: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.IdentityModel.Protocols.WsFederation, Version=5.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
  
  Source Error: 
  
  
   An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  
  
  Assembly Load Trace: The following information can be helpful to determine why the assembly 'Microsoft.IdentityModel.Protocols.WsFederation, Version=5.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded.
  
  
  
  WRN: Assembly binding logging is turned OFF.
  To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
  Note: There is some performance penalty associated with assembly bind failure logging.
  To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
  
  
  
  Stack Trace: 
  
  
  
  [FileNotFoundException: Could not load file or assembly 'Microsoft.IdentityModel.Protocols.WsFederation, Version=5.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.]
     Microsoft.Owin.Security.ActiveDirectory.WsFedMetadataRetriever.GetSigningKeys(String metadataEndpoint, TimeSpan backchannelTimeout, HttpMessageHandler backchannelHttpHandler) +0
     Microsoft.Owin.Security.ActiveDirectory.WsFedCachingSecurityKeyProvider.RetrieveMetadata() +146
     Microsoft.Owin.Security.ActiveDirectory.WsFedCachingSecurityKeyProvider..ctor(String metadataEndpoint, ICertificateValidator backchannelCertificateValidator, TimeSpan backchannelTimeout, HttpMessageHandler backchannelHttpHandler) +296
     Owin.WindowsAzureActiveDirectoryBearerAuthenticationExtensions.UseWindowsAzureActiveDirectoryBearerAuthentication(IAppBuilder app, WindowsAzureActiveDirectoryBearerAuthenticationOptions options) +163
     InnovationInABoxWebApi.App_Start.Startup.ConfigureAuth(IAppBuilder app) in C:\Users\valencil\source\repos\InnovationInABoxWebApi2\InnovationInABoxWebApi\App_Start\Startup.Auth.cs:15
     InnovationInABoxWebApi.App_Start.Startup.Configuration(IAppBuilder app) in C:\Users\valencil\source\repos\InnovationInABoxWebApi2\InnovationInABoxWebApi\Startup.cs:15
  </code></pre>