multi variable random number generator, C#

multi variable random number generator

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            double doubleupperlimit = 2000000;
            double doublelowerlimit = 1000000;
            
            while(doubleupperlimit > 1)
            {
                doubleupperlimit = doubleupperlimit / 10;
                Console.WriteLine(doubleupperlimit);
            }
            Console.WriteLine("done");
            int divisionsNum = 0;
            while(doublelowerlimit >= 1)
            {
                doublelowerlimit = doublelowerlimit / 10;
                Console.WriteLine(doublelowerlimit);
                divisionsNum++;
            }
            Console.WriteLine("done");
            
            long ld = 0;
            Random r = new Random();
            bool done = false;
            while(!done)
            {
                double value = r.NextDouble();
                Console.WriteLine(value);
                if (value < doubleupperlimit && value > doublelowerlimit)
                {
                    ld = (long) (value * Math.Pow(10, divisionsNum));
                    done = true;
                }
                
            }
            
            Console.WriteLine(ld);
        }
    }
}


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