SignalR Core: invalid negotiation response received in a .Net app

Question

I get this error when connecting to a .Net Core SignalR server with a .Net Framework SignalR Core client. How to solve it?

Answer 1

What helped me is adding this to app.config.

<configuration> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" /> <bindingRedirect oldVersion="0.0.0.0-4.0.3.0" newVersion="4.0.3.0" /> </dependentAssembly> </assemblyBinding> </runtime> </configuration>