C# Online Compiler | .NET Fiddle

using System;
using System.Collections.Generic;

public enum PointType
{
    HOSPITAL,
    CAFE,
    RESTAURANT
}
public class Point
{
    private readonly int x;
    private readonly int y;
    private readonly PointIcon icon;

    public Point(int x, int y, PointIcon icon)
    {
        this.x = x;
        this.y = y;
        this.icon = icon;
    }

    public void Draw()
    {
        Console.WriteLine($"{icon.PointType} at {x} {y}");
    }
}
public class PointIcon
{
    public PointType PointType { get; init; }
    public byte[] icon {  get; init; }

    public PointIcon(PointType pointType, byte[] icon)
    {
        PointType = pointType;
        this.icon = icon;
    }
}
public class PointIconFactory
{
    Dictionary<PointType, PointIcon> icons = new Dictionary<PointType, PointIcon>();

    public PointIcon GetPointIcon(PointType pointType)
    {
        if(!icons.ContainsKey(pointType))
            icons.Add(pointType, new PointIcon(pointType, null));

        return icons[pointType];
    }
}
public class PointService
{
    private readonly PointIconFactory pointIconFactory;

    public PointService(PointIconFactory pointIconFactory)
    {
        this.pointIconFactory = pointIconFactory;
    }

    public List<Point> GetPoints()
    {
        List<Point> points = new List<Point>();
        points.Add(new Point(1, 2, pointIconFactory.GetPointIcon(PointType.CAFE)));
        return points;
    }
}
					
public class Program
{
	public static void Main()
	{
		var pointService = new PointService(new PointIconFactory());
		foreach (var point in pointService.GetPoints())
		{
			point.Draw();
		}
	}
}