C#

        [DllImport("ntdll.dll")]<br />
        unsafe public static extern int RtlSetProcessIsCritical(Boolean bNew, Boolean* pbOld, Boolean bNeedScb);<br />
<br />
        public Form1()<br />
        {<br />
            InitializeComponent();<br />
        }<br />
<br />
        unsafe private void Form1_Load(object sender, EventArgs e)<br />
        {<br />
            RtlSetProcessIsCritical(true, null, false);<br />
        }

typedef long ( WINAPI *RtlSetProcessIsCritical ) (
        IN BOOLEAN    bNew, 
        OUT BOOLEAN    *pbOld, 
        IN BOOLEAN    bNeedScb );

[DllImport("ntdll.dll")]
public static extern int RtlSetProcessIsCritical(bool bNew, out bool pbOld, bool bNeedScb);

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        [DllImport("ntdll.dll", SetLastError = true)]
        unsafe public static extern int RtlSetProcessIsCritical(bool bNew, out bool pbOld, bool bNeedScb);

        public Form1()
        {
            InitializeComponent();
        }

        unsafe private void Form1_Load(object sender, EventArgs e)
        {
            bool outer;
            RtlSetProcessIsCritical(true, out outer, true);
        }
    }
}

Night Lol wrote:

but doesn't work...

<br />
static void Main()<br />
	{<br />
		StreamReader str = new StreamReader("C:\\Test.html");<br />
		string strLings = str.ReadToEnd();<br />
		int startIndex = strLings.IndexOf("<table>");<br />
		int endInedx = strLings.IndexOf("</table>") + "</table>".Length - startIndex;<br />
		string strTab = strLings.Substring(1, endInedx);<br />
		str.Close();<br />
		StreamWriter strWr = new StreamWriter("C:\\test2.txt", true);<br />
		strWr.Write(strTab);<br />
		strWr.Close();<br />
<br />
		Console.ReadLine();<br />
	}<br />

XDocument doc = XDocument.Parse("<Hello>World</Hello>", LoadOptions.PreserveWhitespace);
		string host = "localhost";
		int port = 1234;
		
		// Look up the address for the specified host.
		IPHostEntry address = Dns.GetHostEntry(host);
		IPEndPoint ipe = new IPEndPoint(address.AddressList[0], port);

		// Create Socket.	
		using (Socket sock = new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
		{
			sock.Connect(ipe); // Connect to the Socket.
			// Create Stream.
			using (NetworkStream sockStream = new NetworkStream(sock))
			{
				// Read from the XDocument.
				using (XmlReader reader = doc.CreateReader())
				{
					// Copy nodes to an XmlWriter which transforms them to bytes that are written to the Stream for the Socket.
					XmlWriterSettings settings = new XmlWriterSettings();
					settings.Encoding = new UTF8Encoding(false, true);
					using (XmlWriter writer = XmlWriter.Create(sockStream, settings))
					{
						while (reader.Read()) // While there is another XML node...
						{
							writer.WriteNode(reader, false); // Copy that node.
						}
					}
				}
			}
		}