C#

public static byte [] TryReceive (Socket sock, out int nLength)
{
    nLength = 0;
    try {
    int size = sizeof(int);
    byte [] data;
    int recv = 0;
    int offset = 0;

    data = new byte [size];
    while (size > 0) {
        recv = sock.Receive(data, offset, size, SocketFlags.None);
        if (recv == 0)
        return null;
        offset += recv;
        size -= recv;
    } // Makes sure I read the correct number of bytes for an integer

            //Gets the size of the entire packet
    size = BitConverter.ToInt32(data, 0);
    offset = 0;
    data = new byte [size];

    while (size > 0) {
        recv = sock.Receive(data, offset, size, SocketFlags.None);
        offset += recv;
        size -= recv;
    } // Reads in the entire packet
    nLength = data.Length;
    byte [] dataGraph = new byte [data.Length - 1];
    Array.Copy(data, 1, dataGraph, 0, dataGraph.Length);
            //First byte is boolean specifying if it's compressed
    if (BitConverter.ToBoolean(data, 0))
        dataGraph = DecompressBytes(dataGraph);
    return dataGraph;
    }
    catch (OutOfMemoryException) { ObeServer.log.Log(1, "OutOfMemory when receiving packet."); return null; }
        //This error occurs after running for a a couple days on mono
}

WebClient wc = new WebClient();
wc.DownloadFile(@"http://aaa.uuu", @"D:\111.gig");

// Get the physical Path of the file(test.doc)
   string filepath = Server.MapPath("test.doc");
   // Create New instance of FileInfo class to get the properties of the file being downloaded
   FileInfo file = new FileInfo(filepath);
   // Checking if file exists
   if (file.Exists)
   {
    // Clear the content of the response
    Response.ClearContent();
    // LINE1: Add the file name and attachment, which will force the open/cance/save dialog to show, to the header
    Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
    // Add the file size into the response header
    Response.AddHeader("Content-Length", file.Length.ToString());
    // Set the ContentType. function "ReturnExtension" return the proper content type and set it to the Response.ContentType property (not in this listing)
    Response.ContentType = ReturnExtension(file.Extension.ToLower());
    // Write the file into the response (TransmitFile is for ASP.NET 2.0. In ASP.NET 1.1 you have to use WriteFile instead)
    Response.TransmitFile(file.FullName);
    // End the response
    Response.End();
   }