SignalR and C # cause version error
I just installed SignalR and am getting below error. It looks like I have a version issue, but I don't know where to fix it. I installed SignalR using the NuGet installer.
Does anyone know how to fix this?
Could not load file or assembly 'Microsoft.Owin.Host.SystemWeb, Version=0.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly 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.Host.SystemWeb, Version=0.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Source Error:
Line 35: protected void Session_Start(Object sender, EventArgs e)
Line 36: {
Line 37: RouteTable.Routes.MapHubs();
Line 38: }
Line 39: }
Uncaught TypeError: Cannot read property 'client' from undefined signalR_test.html: 35
<!--Script references. -->
<script src="../Scripts/jquery-1.9.1.js"></script>
<script src="../Scripts/jquery.signalR-1.0.0-rc1.js"></script>
<script src="../Scripts/jquery.signalR-1.0.0-rc1.min.js"></script>
<!--Reference the autogenerated SignalR hub script. -->
<script src="/signalr/hubs"></script>
<!--Add script to update the page and send messages.-->
<script type="text/javascript">
$(function () {
// Declare a proxy to reference the hub.
var chat = $.connection.CollaboratorHub;
// Create a function that the hub can call to broadcast messages.
chat.client.broadcastMessage = function (name, message) {
// Html encode display name and message.
-. Packages
<packages>
<package id="EntityFramework" version="5.0.0" targetFramework="net45" />
<package id="jQuery" version="1.8.2" targetFramework="net45" />
<package id="jQuery.UI.Combined" version="1.8.11" targetFramework="net45" />
<package id="jQuery.Validation" version="1.9.0.1" targetFramework="net45" />
<package id="knockoutjs" version="2.1.0" targetFramework="net45" />
<package id="Microsoft.AspNet.Mvc" version="4.0.20710.0" targetFramework="net45" />
<package id="Microsoft.AspNet.Providers.Core" version="1.0" targetFramework="net45" />
<package id="Microsoft.AspNet.Providers.LocalDB" version="1.0" targetFramework="net45" />
<package id="Microsoft.AspNet.Razor" version="2.0.20710.0" targetFramework="net45" />
<package id="Microsoft.AspNet.SignalR" version="1.0.0-rc1" targetFramework="net45" />
<package id="Microsoft.AspNet.SignalR.Core" version="1.0.0-rc1" targetFramework="net45" />
<package id="Microsoft.AspNet.SignalR.JS" version="1.0.0-rc1" targetFramework="net45" />
<package id="Microsoft.AspNet.SignalR.Owin" version="1.0.0-rc1" targetFramework="net45" />
<package id="Microsoft.AspNet.SignalR.SystemWeb" version="1.0.0-rc1" targetFramework="net45" />
<package id="Microsoft.AspNet.Web.Optimization" version="1.0.0" targetFramework="net45" />
<package id="Microsoft.AspNet.WebApi" version="4.0.20505.0" targetFramework="net45" />
<package id="Microsoft.AspNet.WebApi.Client" version="4.0.20710.0" targetFramework="net45" />
<package id="Microsoft.AspNet.WebApi.Core" version="4.0.20710.0" targetFramework="net45" />
<package id="Microsoft.AspNet.WebApi.WebHost" version="4.0.20710.0" targetFramework="net45" />
<package id="Microsoft.AspNet.WebPages" version="2.0.20710.0" targetFramework="net45" />
<package id="Microsoft.jQuery.Unobtrusive.Ajax" version="2.0.20505.0" targetFramework="net45" />
<package id="Microsoft.jQuery.Unobtrusive.Validation" version="2.0.20505.0" targetFramework="net45" />
<package id="Microsoft.Net.Http" version="2.0.20710.0" targetFramework="net45" />
<package id="Microsoft.Owin.Host.SystemWeb" version="1.0.0-rc1" targetFramework="net45" />
<package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />
<package id="Modernizr" version="2.6.2" targetFramework="net45" />
<package id="Newtonsoft.Json" version="4.5.9" targetFramework="net45" />
<package id="Owin" version="1.0" targetFramework="net45" />
<package id="WebGrease" version="1.1.0" targetFramework="net45" />
</packages>
Where it is used: AlumCloud
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It seems to me that the problem is that you are using an assembly that wants to depend on a specific version of Microsoft.Owin.Host.SystemWeb: i.e. version X, but version Microsoft.Owin.Host.SystemWeb loaded is version Y. CLR will raise the error by default.
You can fix this by making sure you are using the same version (e.g. X) consistently and that all of your dependent assemblies reference that version.
You may need to view all of your assemblies in ildasm / reflector to see which version they are loading.
OR, you can try to force the CLR to accept a different version of the assembly by using an assembly binding redirect that tells the CLR "load version Y when some assembly requests version X". Even if you try this, your application will only succeed if there are no changes in the public build interface.
(Note 1, I can't tell from your question where he found Microsoft.Owin.Host.Systemweb, but with no further information, I would guess its the app folder folder and it doesn't affect the answer, but it gets in the way of debugging the version mismatch .)
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