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SignalR is used by some of the Optimizely apps, such as [Live Monitor](🔗).

Note

If you get errors about SignalR not being set up correctly when you start the Episerver user interface in the JavaScript console, clear the .NET temporary files.

Configure SignalR as follows:

  1. If you are using Visual Studio 2012, ensure that .NET Framework 4.5.1 (or later) and the developer pack are installed.

  2. In Visual Studio, do the following steps in a project file, such as _Alloy.csproj_: a. Right-click the project and select **Properties**. b. Change _Target framework_ to **.NET Framework 4.5.1 or later**. c. Save the project as solution, for example, _Alloy.sln_.

  3. Install the _Microsoft.AspNet.SignalR_ package from _NuGet.org_, or go to Visual Studio > **Tools** > **NuGet Package Manager** > **Package Manager Console**, and run the command: 

    
  4. Open _web.config_ and add the following lines:  
    
    The `newVersion` is the real version value of running assemblies on the    website. For example, 2.0.1.0 for Microsoft.Owin, 2.0.3.0 for Microsoft.AspNet. SignalR.Core might not be running on your website.
  5. Add the following line in _web.config_ under **appSettings**:  
    
  6. Rebuild the solution and refresh the website. Ensure the website runs as normal.
  7. Log in to the website and go to **Add-ons** (applications) and install the [Live Monitor](🔗).
  8. Restart the website.
  9. Open _web.config_ again, and change the following line under **appSettings**:  
    
    to
    
    This example shows configuration for Content Collaboration. For LiveMonitor, the startup value is `EPiServerLiveMonitorOWINStartup`.
## OWIN start up and optimizeCompilations
Note
The OWIN startup needs a class. To set up a start-up class, see [OWIN authentication](🔗).
If your project previously did not have an OWIN startup class, and `optimizeCompilations` was enabled, then sometimes the new code is not executed, which may result in errors because the OWIN functionality is not set up. To work around this, temporarily set `optimizeCompilations` in _web.config_ to **false** to clear the cache, start the site, and then you can set `optimizeCompilations` to **true** again.