Need to receive custom events from the server

My application is a event driven application and my application must support two types of events
Solicited Events - Similar to request and response typeUnsolicited Events - Here the server will send events to client without any request.
I need to have an infinite loop to receive type 2 events from the server.
 I have created this kind of application using Windows Forms. How can i achive building this application in ASP.NET

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