Playground

import System;

public record value Point
{
	public:
		i32 X;
		i32 Y;
		new(i32 X, i32 Y);
}

Where(Point p) : str => p switch
{
	(0, 0) => "origin",
	Point(0, var y) => "on the Y axis at " + y,
	(var x, 0) => "on the X axis at " + x,
	{ X: > 0, Y: > 0 } => "first quadrant",
	_ => "elsewhere",
};

Main()
{
	Console.WriteLine(Where(new Point(0, 0)));
	Console.WriteLine(Where(new Point(0, 5)));
	Console.WriteLine(Where(new Point(3, 0)));
	Console.WriteLine(Where(new Point(1, 2)));
	Console.WriteLine(Where(new Point(-1, 2)));
	Console.WriteLine((1, "a") is (1, _));
}