.NET (Core and Framework)

Server:
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Runtime.Serialization.Formatters.Binary;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            IPEndPoint ip = new IPEndPoint(IPAddress.Any, 9999);
            Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            s.Bind(ip);
            s.Listen(10);
            Console.WriteLine("Waiting for a client...");
            Socket cli = s.Accept();
            IPEndPoint cliep = (IPEndPoint)cli.RemoteEndPoint;
            Console.WriteLine("Connected with {0} at port {1}", cliep.Address, cliep.Port);

            byte[] buffer = new byte[1024];
            cli.Receive(buffer);
            string fname = Encoding.ASCII.GetString(buffer);

            Console.WriteLine("filename is " + fname);
            Console.ReadLine();
                       
            cli.Receive(buffer);
            Object obj = new Object();
            obj = bytearraytoobject(buffer);

            ArrayList al = (ArrayList)obj;
            int i = 0;
            foreach (Object o in al)
            {
                Console.WriteLine("\t[{0}]:\t{1}", i++, o);
            }
            Console.WriteLine();

            ArrayList qal=new ArrayList();
            Random rnd = new Random(DateTime.Now.Millisecond);
            for (int counter = 0; counter < 5; counter++)
            {
                int randomindex = rnd.Next(al.Count);
                Console.WriteLine("{0}:{1}", counter+ 1, al[randomindex]);
                qal.Add(al[randomindex]);
            }

            foreach (Object o in qal)
            {
                Console.WriteLine("\t[{0}]:\t{1}", i++, o);
            }

            Object ob = (Object)qal;            
            buffer = objecttobytearray(ob);
            cli.Send(buffer);
            
            Console.ReadLine();

        }
        static Object bytearraytoobject(byte[] buffer)
        {
            MemoryStream ms = new MemoryStream();
            BinaryFormatter bf = new BinaryFormatter();
            ms.Write(buffer, 0, buffer.Length);
            ms.Seek(0, SeekOrigin.Begin);
            Object obj = (Object)bf.Deserialize(ms);
            return obj;
        }
        static byte[] objecttobytearray(Object obj)
        {
            if (obj == null)
                return null;
            BinaryFormatter bf = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();
            bf.Serialize(ms, obj);
            return ms.ToArray();
        }

    }
}

client:
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Runtime.Serialization.Formatters.Binary;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            IPEndPoint ip = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9999);

            Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            try
            {
                s.Connect(ip);
            }
            catch (SocketException e)
            {
                Console.WriteLine("Unable to connect to server" + e);
                return;
            }

            Console.WriteLine("Enter the input file ");
            string inp = Console.ReadLine();

            s.Send(Encoding.ASCII.GetBytes(inp));

            StreamReader sr = new StreamReader(@"c:\" + inp);
            ArrayList al = new ArrayList();

            while (!sr.EndOfStream)
            {
                al.Add(sr.ReadLine());
            }

            Object o = (Object)al;
            byte[] buffer = new byte[1024];
            buffer = objecttobytearray(o);
            s.Send(buffer);

            byte[] buf = new byte[1024];
            Object obj = new Object();
            s.Receive(buf);                        
            obj = bytearraytoobject(buf);
            ArrayList qal = (ArrayList)obj;

            int i = 1;
            foreach (Object ob in qal)
            {
                Console.WriteLine("\t[{0}]:\t{1}", i++, ob);
            }
            Console.WriteLine();

            Console.ReadLine();

        }
        static byte[] objecttobytearray(Object obj)
        {
            if (obj == null)
                return null;
            BinaryFormatter bf = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();
            bf.Serialize(ms, obj);
            return ms.ToArray();
        }
        static Object bytearraytoobject(byte[] buffer)
        {
            MemoryStream ms = new MemoryStream();
            BinaryFormatter bf = new BinaryFormatter();
            ms.Write(buffer, 0, buffer.Length);
            ms.Seek(0, SeekOrigin.Begin);
            Object obj = (Object)bf.Deserialize(ms);
            return obj;
        }
    }
}

peterdrozd wrote:

I could not figure out how to change the background color though.

Ajakblackgoat wrote:

I've tried using RichTextBox but when the text in it becomes large, it becomes noticeably slow to update the text.

I are Troll

Ajakblackgoat wrote:

it's very fast in displaying 100MB++ of text data complete with highlights and formatting. And I believe it's not richtextbox.

I are Troll

Eddy Vluggen wrote:

It's not the control that makes it fast, it's the way they handle loading. Doing formatting and highlighting on 100Mb+ costs time, but you don't have to highlight what you cannot see. I'd also imagine that such applications load the parts that they're actually working with, as opposed to loading the entire file into memory.

Eddy Vluggen wrote:

Still, the ListBox would be the way to go.

Ajakblackgoat wrote:

Richtextbox doesn't handle it the same way?

Ajakblackgoat wrote:

But still it lacks textbox-like select & copy functionality.

Ajakblackgoat wrote:

I know what it's limitation which hinders me from using it for this particular app.

Ajakblackgoat wrote:

Perhaps I didn't post my question clearly. I was asking if anyone had come across a control which does the same, not how to do it.

I are Troll

Ajakblackgoat wrote:

which I think will be tedious if possible