Initial Commit ...

Interfaces/IXEventBus.cs

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+using xEventService.Models;
+
+namespace xEventService.Interfaces {
+    public interface IXEventBus {
+        bool Publish<T> (T @event) where T : XEvent;
+
+        bool Subscribe<TEvent, THandler> ()
+        where TEvent : XEvent
+        where THandler : IXEventHandler<TEvent>;
+    }
+}

Interfaces/IXEventHandler.cs

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+using System.Threading.Tasks;
+using xEventService.Models;
+
+namespace xEventService.Interfaces {
+    public interface IXEventHandler<in TEvent> : IXEventHandler
+    where TEvent : XEvent {
+        Task HandleAsync (TEvent @event);
+    }
+
+    public interface IXEventHandler { }
+}