Could not load file or assembly 'Microsoft.Owin,

[Tomasz]

1. Install syncfusionessentialaspnet

2. Configuring toolbox for VS 2015 with framework 4.5.1 for aspnet.

3. Open Visual Studio 2015.

3. Create project SyncfusionWebApplication.

4. Add "DatePicker" to web page.

5 Open web page in IE.

6. Result :

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:

Line 73:             //    ClientSecret = ""
Line 74:             //});
Line 75:         }
Line 76:     }
Line 77: }

Source File: c:\users\tomasz\documents\visual studio 2015\Projects\SyncfusionASPNETWebApplication1\SyncfusionASPNETWebApplication1\App_Start\Startup.Auth.cs    Line: 75

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)]
   SyncfusionASPNETWebApplication1.Startup.ConfigureAuth(IAppBuilder app) in c:\users\tomasz\documents\visual studio 2015\Projects\SyncfusionASPNETWebApplication1\SyncfusionASPNETWebApplication1\App_Start\Startup.Auth.cs:75
   SyncfusionASPNETWebApplication1.Startup.Configuration(IAppBuilder app) in c:\users\tomasz\documents\visual studio 2015\Projects\SyncfusionASPNETWebApplication1\SyncfusionASPNETWebApplication1\Startup.cs:18

[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) +92
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +101
   Owin.Loader.<>c__DisplayClass12.<MakeDelegate>b__b(IAppBuilder builder) +66
   Owin.Loader.<>c__DisplayClass1.<LoadImplementation>b__0(IAppBuilder builder) +123
   Microsoft.Owin.Host.SystemWeb.<>c__DisplayClass2.<InitializeBlueprint>b__0(IAppBuilder builder) +71
   Microsoft.Owin.Host.SystemWeb.OwinAppContext.Initialize(Action`1 startup) +462
   Microsoft.Owin.Host.SystemWeb.OwinBuilder.Build(Action`1 startup) +40
   Microsoft.Owin.Host.SystemWeb.OwinHttpModule.InitializeBlueprint() +70
   System.Threading.LazyInitializer.EnsureInitializedCore(T& target, Boolean& initialized, Object& syncLock, Func`1 valueFactory) +115
   Microsoft.Owin.Host.SystemWeb.OwinHttpModule.Init(HttpApplication context) +106
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +534
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +339
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9946132
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +90
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +261

I hope that one day someone makes something that works smoothly.

[Deepa Loganathan]

Hi Tomasz,  

Thanks for contacting Syncfusion support.  

We were not able to reproduce the reported issue on our end. 

After checking the screenshot, we suspect that the assembly “Microsoft.Owin” was not referred in your project.  

So, please install the missing assembly by using the following command in your Package manager console 

 

install-Package Microsoft.Owin 

 

 

If you still face any such issues in your project, then kindly let us know. 

Regards,  

Deepa L. 

[Tomasz]

In this case the proble is in version of the Microsoft Owin, adding this information to configuration manager:

<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin" culture="neutral" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
</assemblyBinding><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="WebGrease" culture="neutral" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" />
</dependentAssembly></assemblyBinding><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
</dependentAssembly></assemblyBinding>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security" culture="neutral" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
</assemblyBinding>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security.Cookies" culture="neutral" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
</assemblyBinding>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security.OAuth" culture="neutral" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
</dependentAssembly>
</assemblyBinding>

and next warnnig.

is about processor architecture:

changing the targeted processor architecture in the project through the Configuration Manager to x86. solved the all problems in your template.

Thank You 

Tomasz

[Deepa Loganathan]

Hi Tomasz,  

We are glad to know that the issue has been resolved.  

Please let us know if you need any further assistances.  

Regards,  

Deepa L.