C#

public List<iattachmentlist> iattachmentagents = new List<iattachmentlist>();




 public class iattachmentlist
        {
            private  string _title;
            private  stream _attachment;
            public string TITLE { get { return _title; } set { _title = value; } }
            public stream ATTACHMENT { get { return _attachment; }  set { _attachment = value; } }
            public iattachmentlist(string xtitle, object xattachment)
            {
                _title = xtitle;
                _attachment = xattachment;
            }

        }


 private void attachmentsbutton_Click(object sender, EventArgs e)
        {
            
            emailattachment attachform = new emailattachment();
            attachform.pgsource = pgsource;
            attachform.id = id;
            attachform.iattachmentagents = ?????????;
            attachform.ShowDialog();
            attachform.Close();
        }

public static List<PartModel> QueryInventoryParts(List<<SearchItemModel>> SearchTerms, int ProducId = 0)
{
    using (SparesDataContext context = getDataContext())
    {
        List<<PartModel>> retVal = new List<<PartModel>>();

        foreach (SearchItemModel searchModel in SearchTerms)
        { 
            List<<PartModel>> results = (from pp in context.mmlProductsParts
                                        join pa in context.tblParts on pp.PartId equals pa.PartId
                                        where pa.PartNumber.Contains(searchModel.SearchTerm) ||
                                                pa.Keyword.Contains(searchModel.SearchTerm)
                                        select new PartModel
                                        {
                                            PartId = pa.PartId,
                                            Category = GetCategory(pa.CategoryId),
                                            PartNumber = pa.PartNumber,
                                            Keywords = pa.Keyword,
                                            PartDescription = pa.Description,
                                            Price = pa.Price.Value,
                                            Ratio = pa.Ratio.Value,
                                            Tribal = pa.Tribal
                                        }).ToList();

            foreach (var result in results)
            {
                retVal.Add(result);
            }
        }
        return retVal;
    }
}

var temp = (from pr in context.tblProducts
                join pp in context.mmlProductsParts on pr.ProductId equals pp.ProductId
                join pa in context.tblParts on pp.PartId equals pa.PartId
                where pr.ProductSeries.Contains(searchModel.SearchTerm) ||
                        pr.ProductNumber.Contains(searchModel.SearchTerm)
                select new ProductModel
                {
                    ProductId = pr.ProductId,
                    ProductNumber = pr.ProductNumber,
                    ProductSeries = pr.ProductSeries,
                    Parts = (new PartModel
                            {
                                PartId = pa.PartId,
                                Category = GetCategory(pa.CategoryId),
                                PartNumber = pa.PartNumber,
                                Keywords = pa.Keyword,
                                PartDescription = pa.Description,
                                Price = pa.Price.Value,
                                Ratio = pa.Ratio.Value,
                                Tribal = pa.Tribal
                            }).ToList())
                }).ToList();

using (DataSet data = DataGateway.getAbsence(TripNum)) 
{ 
  data.DataSetName = "Absence"; 
  data.Tables[0].TableName = "Employee"; 
  XmlDataDocument xmldoc = new XmlDataDocument(Data); 
  XslTransform xslt = new XslTransform; 
  string xsltfile = "myfile.xsl"; 
  xslt.Load(xsltfile); 
  TextWriter writer = new StringWriter(); 
  xslt.Transform(xmldoc, null, writer, null); 
  MailMessage mail = new MailMessage(); 
  mail.Body = writer.ToString(); 
  mail.From = "me"; 
  mail.To = "you"; 
  //more code to send mail...... 
}

UDPClient 

UDPClient 

    // This constructor arbitrarily assigns the local port number.
    UdpClient udpClient = new UdpClient("224.0.1.1", 3333);
    try
    {
  //      udpClient.Connect("224.0.1.1", 3333);

        // Sends a message to the host to which you have connected.

        MemoryStream ms = new MemoryStream();
        BinaryWriter bw = new BinaryWriter(ms);

        Int32 b = 0x01;
        bw.Write(b); //MsgOpCode = 0x01
        string str = "FF:FF:FF:FF:FF:FF";
        bw.Write(Encoding.ASCII.GetBytes(str.ToCharArray()));//mac
        bw.Write('\0');//-ip
        bw.Write('\0');//-mask

        byte[] byteArray = ms.GetBuffer();

        udpClient.Send(byteArray, byteArray.Length);

        // Sends a message to a different host using optional hostname and port parameters.

        //IPEndPoint object will allow us to read datagrams sent from any source.
        IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);

        // Blocks until a message returns on this socket from a remote host.
        Byte[] receiveBytes = udpClient.Receive(ref RemoteIpEndPoint);
        string returnData = Encoding.ASCII.GetString(receiveBytes);

        // Uses the IPEndPoint object to determine which of these two hosts responded.
        Console.WriteLine("This is the message you received " +
                                     returnData.ToString());
        Console.WriteLine("This message was sent from " +
                                    RemoteIpEndPoint.Address.ToString() +
                                    " on their port number " +
                                    RemoteIpEndPoint.Port.ToString());

        udpClient.Close();
    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
    }
}