Kata de las gasolineras en C# (http://www.subgurim.net/Articulos/mundo-web/196/kata-de-las-gasolineras.aspx)

kata.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace KataGasolinera
{
    public class Point
    {
        public Point(int x, int y)
        {
            X = x;
            Y = y;
        }

        public int X { get; private set; }

        public int Y { get; private set; }

        public int DistanceTo(Point p)
        {
            return (int)(Math.Sqrt(Math.Pow(X - p.X, 2) + Math.Pow(Y - p.Y, 2)));
        }

        public override string ToString()
        {
            return string.Format("({0}, {1})", X, Y);
        }
    }

    public class Randomizer
    {
        private readonly int _maxValue;

        private readonly Random _random = new Random();

        public Randomizer(int maxValue)
        {
            this._maxValue = maxValue;
        }

        public Point GetRandomPointInRoute(Point a, Point b)
        {
            var x = this._random.Next(Math.Min(a.X, b.X), Math.Max(a.X, b.X));
            var y = this._random.Next(Math.Min(a.Y, b.Y), Math.Max(a.Y, b.Y));

            return new Point(x, y);
        }

        public Point GetRandomPoint()
        {
            return new Point(this._random.Next(0, this._maxValue), this._random.Next(0, this._maxValue));
        }

        public IList<Point> GetRandomPoints(int numberOfPoints, Func<Point, Point, bool> condition)
        {
            var points = new List<Point>(numberOfPoints);

            while (points.Count < numberOfPoints)
            {
                var randomPoint = GetRandomPoint();

                if (points.All(p => condition(p, randomPoint)))
                {
                    points.Add(randomPoint);
                }
            }

            return points;
        }
    }

    public class Program
    {
        private const int MapSize = 1000;
        private const int NumberOfStations = 10;
        private const int MinStationDistance = 5;
        private const int MinRouteDistance = 200;

        private static void Main(string[] args)
        {
            var randomizer = new Randomizer(MapSize);

            var stations = randomizer.GetRandomPoints(NumberOfStations, (p, q) => p.DistanceTo(q) > MinStationDistance);
            var route = randomizer.GetRandomPoints(2, (p, q) => p.DistanceTo(q) > MinRouteDistance);

            var position = randomizer.GetRandomPointInRoute(route[0], route[1]);

            var closest = stations.Select(s => new { Station = s, Distance = s.DistanceTo(position) }).OrderBy(r => r.Distance).First();

            Console.WriteLine("I'm at {0} and the closest station is at {1} at a distance of {2}", position, closest.Station, closest.Distance);
            Console.ReadKey();
        }
    }
}