Websockets requiring httpRuntime to use 4.5



I am integrating Annotations on a system with some legacy UI components such that adding httpRuntime to the web,config breaks some parts of the application.

Annotation demo app is using web sockets through SignalR that requires the 4.5 http runtime:


Without this configuration, a SignalR connection throughs 500 error. Please see attached screenshot.

I tried using the following web.config override:
1. use <location path ="[Annotation path]"

2. deploy Annotation on sub-folder with the needed web.config changes to override the behavior.

Both has not worked for me but still has to figure out why. Microsoft’s documentation shows that it overrides the configuration

Do you have other options that I can try?

Thank you.





Thank you for your inquiry.

Using .Net Framework 4.5 is minimum requirement to use our GroupDocs.Annotation for .NET API based open source front-end (MVC/WebForms) and as per your scenario its all at overriding the ASP.Net configuration depend on the deployment scenarios and configurations settings from root application to sub-folder applications.

Please try this link that we hope more clear the workaround as per your requirements by inserting “” tag before ""

It is recommended that you may get exact solution from relative Microsoft forums.

Warm Regards,


Thank you for the advice.

I looked into clearing the configuration but it did not work… There are some dependencies that is probably preventing the inheritance.

I will continue looking into this.






You are always welcome.

If you will need any help or you will have any other questions regarding GroupDocs.Annotation for .NET API please feel free to ask.

Best Wishes,