sun.phaisarn.com

using System.Net;

//...
using (WebClient client = new WebClient ()) // WebClient class inherits IDisposable
{
    client.DownloadFile("http://yoursite.com/page.html", @"C:\localfile.html");

    // Or you can get the file content without saving it:
    string htmlCode = client.DownloadString("http://yoursite.com/page.html");
    //...

}

How can I download HTML source in C#

C# Code Snippet - Download HTML Web Page

WebClient Class