Understanding POST Receipts on C#.NET

You cannot create a program that "automatically starts when POST is sent".Because regular applications need to monitor specific ports to handle HTTP requests.Therefore, if you are using HttpListener, the correct implementation is to wait blocking until at least the first request.

Also, when using the ASP.NET family, the framework will handle the request until it starts, so programmers only need to implement actions and form events that correspond to specific URLs.

Regardless of which way it is implemented, it is not different in principle from using HTML page Form.First, check if you can receive requests at that level.Also, JSON is stored in the request body, so you can read the payload by passing the Stream obtained from HttpRequest.GetBufferedInputStream() to an appropriate serializer such as Json.NET.