Closest Two Points

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

namespace ConsoleApp2
{
    class Program
    {
        public class point
        {
            public double x;
            public double y;
            public void read()
            {
                string[] input = Console.ReadLine().Split(' ').ToArray();
                this.x = double.Parse(input[0]);
                this.y = double.Parse(input[1]);
            }
        }
        static double dist(point a, point b)
        {
            double x1 = a.x, x2=b.x, y1=a.y, y2=b.y;
            double dist = (x1-x2)*(x1-x2) +(y1-y2)*(y1-y2);
            return ((int)(Math.Sqrt(dist)*10000))/10000.0;
        }
        static void Main(string[] args)
        {
            int x = int.Parse(Console.ReadLine());
            point p1 = new point();
            point p2 = new point();
            List<point> points = new List<point>();
            while (x!=0)
            {
                p1.read();
                points.Add(p1);
                x--;
            }
            x = points.Count;
            double minDist = double.MaxValue;
            for(int i=0; i<x; i++)
            {
                for(int j=i+1; j<x; j++)
                {
                    double d = dist(points[i], points[j]);
                    if (d<minDist)
                    {
                        minDist = d;
                        p1 = points[i];
                        p2 = points[j];
                    }
                }
            }
            Console.WriteLine("{0:f3}\n{1} {2}\n{3} {4}", minDist, p1.x, p1.y, p2.x, p2.y);
        }
    }
}