test, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            byte[] bytesFromLong = BitConverter.GetBytes(10648738977740919977);
            byte[] bytesFromImplicitlyCastDouble = BitConverter.GetBytes((double)10648738977740919977);
            byte[] bytesFromDouble = BitConverter.GetBytes(10648738977740919977d);

string res = "Long Bytes: ".PadRight(28) + "0x";
            foreach(byte b in bytesFromLong)
            {
                res += b.ToString();
            }
            
            res += "\n";
            res += "ImplicitlyCastDouble Bytes:".PadRight(28) + "0x";
            foreach(byte b in bytesFromImplicitlyCastDouble)
            {
                res += b.ToString();
            }

res += "\n";
            res += "Double Bytes:".PadRight(28) + "0x";
            foreach (byte b in bytesFromDouble)
            {
                res += b.ToString();
            }
            Console.WriteLine(res);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,22 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 13 Mb, average nr of threads: 3, absolute service time: 0,33 sec