SignalR 2.0 error: Could not load file or assembly Microsoft.Owin.Security

Question

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\

Answer 1

I fixed it by changing my Web.config configuration tag:

from this:

<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">

to this:

<configuration>

dont know why this works.

Answer 2

In my case, I had two projects:

• MyProj.MvcWeb (an MVC application that referenced Microsoft.Owin.Security 3.0.0)
• MyProj.Data.Entities (a class library that referenced Microsoft.Owin.Security 2.1.0; not sure how this happened)

Upgrading Microsoft.Owin.Security from 2.1.0 to 3.0.0 in the MyProj.Data.Entities project fixed the issue for me.

Answer 3

In my case, I have this error in code first during "update database". I put "Set a as startUp a Project" in project with migration.it helped me

Answer 4

Renaming app.config to web.config works for me. Or just make a copy of app.config and call it web.config

Answer 5

Simple, Go to your web.config file. Change the "bindingRedirect" tag for Microsoft.Owin, Microsoft.Owin.Security.OAuth, Microsoft.Owin.Security.Cookies, Microsoft.Owin.Security to as follows:

<bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="2.0.1.0" />

this could work.

Answer 6

I took your idea, thanks for the research you did, and I did it like this:

get-project PerfSurf | Update-Package Microsoft.Owin.Security

It's much more simpler, and this will update manifest itself.

Ignore this (get-project PerfSurf) part, as I use it because I have multiple test project and don't want to update them all