Streaming Server Events with SSE and Blazor

Server-Sent Events (SSE) enable unidirectional real-time data streaming from server to client over HTTP. With .NET 10, a new TypedResults.ServerSentEvents<T>() API converts any IAsyncEnumerable<T> into a properly formatted SSE stream automatically, handling JSON serialization, headers, and connection management. The tutorial walks through building a Blazor Web App that streams live system events: creating an EventBroadcaster channel bus, a background event generator service, a minimal API SSE endpoint, and a Blazor component using the browser's EventSource API via JS interop. A Telerik UI for Blazor DataGrid is used to display and filter the incoming events in real time.