using System;

using System.Collections.Generic;

​

Dictionary<Vector2, string> hd = new()

{

    {new(0,0), "Zero" },

    {new(0,1), "{0, 1}"},

    {new(1,0), "{1, 0}"},

    {new(1,1), "{1, 1}"}

};

foreach (var (key, value) in hd)

    Console.WriteLine($"Key: {{{key.x}, {key.y}}}. Value: {value}");

public record Vector2 (double x, double y);