For learning experience I wrote my own http server code, my prime focus is on beginners who want to write their own http server. In my code I am simply writing a html string on the browser however when I wrote this code a very obvious question came into my mind
that "Can I display Image on browser through this code ? ", well YES we can do this by simply reading the image bytes and writing it on to the output stream.
Steps to test this code 
1-Run the application
2-Open your browser type http://localhost:2000/ and hit enter 
2000 is my port number it can be different in your case

using System;
using System.Linq;

using System.Net;
using System.Threading;

namespace ConsoleApplication3
{
class Program
{
public static HttpListener _list = new HttpListener();
static void Main(string[] args)
{

_list.Prefixes.Add("http://localhost:2000/");

_list.Start()
Console.WriteLine("server started");
Thread th = new Thread(loadsite);
th.Start();
Console.Read();
}
protected static void loadsite()
{
while (true)
{
HttpListenerContext context = _list.GetContext();
byte[] response = Encoding.UTF8.GetBytes("<html><body>hello world</body></html>");
context.Response.OutputStream.Write(response, 0, response.Length);
context.Response.KeepAlive = false;
context.Response.Close();

}
}
}