using System;

​

public abstract record WebEvent()

{

    public record PageLoad() : WebEvent;

    public record PageUnload() : WebEvent;

    public record KeyPress(char key) : WebEvent;

    public record Paste(string text) : WebEvent;

    public record Click(int x, int y) : WebEvent;

}

​

public static class Program

{

    public static void Main()

    {

        HandleEvent(new WebEvent.Click(120, 40));

        HandleEvent(new WebEvent.Paste("Hello World"));

    }

​

    public static void HandleEvent(WebEvent e)

    {

        var result = e switch

        {

            WebEvent.PageLoad => "Page Loaded",

            WebEvent.PageUnload => "Page Unloaded",

            WebEvent.KeyPress(char key) => $"{key} key pressed",

            WebEvent.Paste(string text) => $"{text} pasted",

            WebEvent.Click(int x, int y) => $"Mouse clicked coordinate ({x}, {y})",

        };

​

        Console.WriteLine(result);

    }

}

​