powerfun-new-net/Unility/CommonHelper.cs

using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Text;
using TurfCS;

namespace OnlineUserPool.Unility
{
    public class CommonHelper
    {
        public static double GetDistances(double lon, double lat, double lon1, double lat1)
        {
            var pt1 = Turf.Point(new double[] { lon, lat });
            var pt2 = Turf.Point(new double[] { lon1, lat1 });

            var value = Turf.Distance(pt1, pt2, "kilometers") * 1000;
            return Math.Round(value, 2);
        }

        public static int GenerateRandomInteger(int min = 0, int max = int.MaxValue)
        {
            var randomNumberBuffer = new byte[10];
            new RNGCryptoServiceProvider().GetBytes(randomNumberBuffer);
            return new Random(BitConverter.ToInt32(randomNumberBuffer, 0)).Next(min, max);
        }
    }
}