SignalR 2.0 error: Could not load file or assembly Microsoft.Owin.Security
.net, asp.net, c#, signalr
Solution
Ok I've solved it.
I had to upgrade my Microsoft.Owin.Security package to 2.1.0 with this command
Install-Package Microsoft.Owin.Security -Version 2.1.0
And modify the bindings in my App.config like this
<assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-2.1.0.0" newVersion="2.1.0.0" />
Problem
I'm following this tutorial step by step http://www.asp.net/signalr/overview/signalr-20/getting-started-with-signalr-20/tutorial-signalr-20-self-host And I'm getting an exception on the line marked below ``` string url = "http://localhost:8080"; using (WebApp.Start(url)) //<------ error on this line { Console.WriteLine("Server running on {0}", url); Console.ReadLine(); } ``` Error message: Could not load file or assembly 'Microsoft.Owin.Security, Version=2.0.1.0, 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) More info: In my project solution, the reference is pointing to the dll in the packages folder from NuGet This has been added in my App.config file by NuGet ``` <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" /> <bindingRedirect oldVersion="0.0.0.0-2.1.0.0" newVersion="2.1.0.0" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" /> <bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="2.0.0.0" /> </dependentAssembly> </assemblyBinding> ``` In the packages folder, `packages\Microsoft.Owin.Security.2.0.0\lib\net45`, the file version of Microsoft.Owin.Security.dll is 2.020911.395