问题
Am getting this error after deploying .net MVC application into my test server. In dev machine its working fine
Server Error in '/' Application. Could not load file or assembly 'Microsoft.Owin, Version=2.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) 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.FileLoadException: Could not load file or assembly 'Microsoft.Owin, Version=2.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
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.Owin, Version=2.1.0.0, 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:
[FileLoadException: Could not load file or assembly 'Microsoft.Owin, Version=2.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)] jp.Startup.ConfigureAuth(IAppBuilder app) +0
[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +128
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +142
Owin.Loader.<>c__DisplayClass12.b__b(IAppBuilder builder) +93
Owin.Loader.<>c__DisplayClass1.b__0(IAppBuilder builder) +212
Microsoft.Owin.Host.SystemWeb.OwinAppContext.Initialize(Action1 startup) +873
Microsoft.Owin.Host.SystemWeb.OwinBuilder.Build(Action1 startup) +51
Microsoft.Owin.Host.SystemWeb.OwinHttpModule.InitializeBlueprint() +101
System.Threading.LazyInitializer.EnsureInitializedCore(T& target, Boolean& initialized, Object& syncLock, Func`1 valueFactory) +135
Microsoft.Owin.Host.SystemWeb.OwinHttpModule.Init(HttpApplication context) +160
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +580
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +165
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +267
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +341
[HttpException (0x80004005): Exception has been thrown by the target of an invocation.] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +523 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +107 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +688
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3163.0
回答1:
this is caused by assembly version miss match, and can be fixed by Redirecting Assembly Versions , please refer to https://docs.microsoft.com/en-us/dotnet/framework/configure-apps/redirect-assembly-versions .
And redirections can be generated by vs automatically, please refer to https://docs.microsoft.com/en-us/dotnet/framework/configure-apps/how-to-enable-and-disable-automatic-binding-redirection
来源：https://stackoverflow.com/questions/55142331/microsoft-owin-error-after-deploying-in-test-server