Closest Two Points

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

namespace ClosestTwoPoints
{
    class Program
    {
        static int numberOfPoints;
        static int firstPointIndex;
        static int secondPointIndex;

        public static void Main(string[] args)
        {
            numberOfPoints = int.Parse(Console.ReadLine());

            Point[] allPoints = ReadPoints();

            double smallestDistance = FindTheSmallestDistance(allPoints);

            PrintResult(smallestDistance, allPoints);
        }

        static void PrintResult(double smallestDistance, Point[] allPoints)
        {
            Console.WriteLine("{0:f3}\r\n", smallestDistance);

            Console.WriteLine("({0} {1})", allPoints[firstPointIndex].X, allPoints[firstPointIndex].Y);
            Console.WriteLine("({0} {1})", allPoints[secondPointIndex].X, allPoints[secondPointIndex].Y);
        }

        static double FindTheSmallestDistance(Point[] allPoints)
        {
            double smallestDistance = double.MaxValue;

            for (int currentPoint = 0; currentPoint < allPoints.Length; currentPoint++)
            {
                for (int currentCheck = currentPoint + 1; currentCheck < allPoints.Length; currentCheck++)
                {
                    double firstSide = allPoints[currentPoint].X - allPoints[currentCheck].X;
                    double secondSide = allPoints[currentPoint].Y - allPoints[currentCheck].Y;

                    double distance = CalculateTheDistance(firstSide, secondSide);

                    if (distance < smallestDistance)
                    {
                        smallestDistance = distance;
                        firstPointIndex = currentPoint;
                        secondPointIndex = currentCheck;
                    }
                }
            }

            return smallestDistance;
        }

        static double CalculateTheDistance(double firstSide, double secondSide)
        {
            return Math.Sqrt(firstSide * firstSide + secondSide * secondSide);
        }

        static Point[] ReadPoints()
        {
            Point[] points = new Point[numberOfPoints];

            for (int currentInput = 0; currentInput < numberOfPoints; currentInput++)
            {
                int[] currentPoints = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

                points[currentInput] = new Point()
                {
                    X = currentPoints[0],
                    Y = currentPoints[1]
                };
            }

            return points;
        }
    }

    class Point
    {
        public int X { get; set; }

        public int Y { get; set; }
    }
}