linq test, C# - rextester

linq test

//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;
using System.Text;
using System.Net;
namespace Rextester
{
    public class Program
    {
        public enum RequestType
        {
            None=0,
            Message=1,
            Command=2
        }
        public static void Main(string[] args)
        {
            //Your code goes here
            Console.WriteLine("Hello, world!");
            int length=0x12345678;
            length = System.Net.IPAddress.HostToNetworkOrder(length);
            var bytes = BitConverter.GetBytes(length);
            bytes = bytes.Concat(new byte[]{0x09,0x0a}).ToArray();
            Console.WriteLine("{0:x},{1:x},{2:x},{3:x},{4:x}",bytes[0],bytes[1],bytes[2],bytes[3],bytes[4]);
            
            int _type = 0x12345678, _dataLength=8;
            byte[] _data =new byte[0];// Encoding.UTF8.GetBytes("ABCDEFGH");
            var type = BitConverter.IsLittleEndian ? IPAddress.HostToNetworkOrder(_type) : _type;
            var dataLength = BitConverter.IsLittleEndian ? IPAddress.HostToNetworkOrder(_dataLength) : _dataLength;
            var bytes2 = BitConverter.GetBytes(type).Concat(BitConverter.GetBytes(dataLength)).Concat(_data);
            foreach(var b in bytes2)
             {
                Console.WriteLine("{0:x}",b);
             }
            //SelectVsSelectMany();
            //string data=null;
            //Encoding.UTF8.GetBytes(data);
            if((int)RequestType.Command==2)
            {
            }
        }
        
        static void SelectVsSelectMany()
        {
            List<Bouquet> bouquets = new List<Bouquet>() {
                new Bouquet { Flowers = new List<string> { "sunflower", "daisy", "daffodil", "larkspur" }},
                new Bouquet{ Flowers = new List<string> { "tulip", "rose", "orchid" }},
                new Bouquet{ Flowers = new List<string> { "gladiolis", "lily", "snapdragon", "aster", "protea" }},
                new Bouquet{ Flowers = new List<string> { "larkspur", "lilac", "iris", "dahlia" }}
            };
        
            // *********** Select ***********            
            IEnumerable<List<string>> query1 = bouquets.Select(bq => bq.Flowers);
        
            // ********* SelectMany *********
            IEnumerable<string> query2 = bouquets.SelectMany(bq => bq.Flowers);
        
            Console.WriteLine("Results by using Select():");
            // Note the extra foreach loop here.
            foreach (IEnumerable<String> collection in query1)
                foreach (string item in collection)
                    Console.WriteLine(item);
        
            Console.WriteLine("\nResults by using SelectMany():");
            foreach (string item in query2)
                Console.WriteLine(item);
        
         }
    }
    
    class Bouquet
    {
        public List<string> Flowers { get; set; }
    }

}


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