1.0 Concept
Demonstrates the publish subscribe pattern using C#.
2.0 Structure
Single file PublisherSubscriber/DemoPubSub.cs with four types in the PublisherSubscriber namespace:
Publisher — holds an EventHandler delegate (eventDel) and a nested Eva : EventArgs class that carries a string msg payload. Its doEvents() method fires the event 10 times with a 200 ms delay between each invocation.Subscriber — registers its notified() handler with the publisher's eventDel in its constructor. When notified, it casts the EventArgs to Publisher.Eva to extract and print the message.Utilities — static helper class providing title and putLine delegates for console formatting.Program — entry point; creates a Publisher and a Subscriber, then calls pub.doEvents().
3.0 Operation
Publisher is constructed with a base message string.Subscriber is constructed with a reference to the publisher, wiring its handler via +=.pub.doEvents() loops 10 times, building a numbered message (e.g. "this is demo #3"), sleeping 200 ms, then invoking all registered handlers via eventDel.Invoke().- Each invocation calls
Subscriber.notified(), which prints the message to the console.
4.0 Build and Run
Target framework: net10.0
dotnet build PublisherSubscriber/PublisherSubscriber.csproj
dotnet run --project PublisherSubscriber/PublisherSubscriber.csproj