To give it a try firstly run the SignalR project by selecting SignalRHost as running option instead of IIS Express, then run RealTimeCharting project as a new instance. Once the exe is running open many exe´s as you can and press the button at the top to see it working, this example shows how to send a message from one client to the rest of them.
To run the RealTimeOnetoOne project is the same process described above but this last one needs another client app that uses the "Done" method and share the same business id randomly assigned.
Example: connection.InvokeAsync("Done", false, 12);
Note:
The "applicationUrl" field must be edited in (SignalRHost section) launchSettings.json file along with each client app that targets the same url.