Using signalwithstart in .NET

Hi I was wondering how would you start a workflow using signalWithStart in .NET? I checked the quickstartguide: GitHub - temporalio/sdk-dotnet: Temporal .NET SDK but there was not a clear example of how to execute it.

There is a StartSignal and StartSignalArgs on the workflow options. We have recently added a typesafe SignalWithStart extension method on the workflow options to help set these two, but it is not in a versioned release yet.