C#

private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e)
{
    // Get the unique identifier for this asynchronous operation.
    String token = (string)e.UserState;

    if (e.Cancelled)
    {
        Console.WriteLine("[{0}] Send canceled.", token);
    }
    if (e.Error != null)
    {
        MessageBox.Show(String.Format("[{0}] {1}", token, e.Error.ToString()));
    }
    else
    {
        Console.WriteLine("Message sent.");
    }

    mailSent = true;
}
        
private static void send_message()
{
    // Command line argument must the the SMTP host.
    SmtpClient client = new SmtpClient("smtp.gmail.com");
    client.Port = 587;
    client.Credentials = new System.Net.NetworkCredential("it@mydomain.com", "my_password");
    client.EnableSsl = true;

    // Specify the e-mail sender. 
    // Create a mailing address that includes a UTF8 character 
    // in the display name.
    MailAddress from = new MailAddress("it@mydomain.com", "My" + (char)0xD8 + " Company", System.Text.Encoding.UTF8);
    // Set destinations for the e-mail message.
    MailAddress to = new MailAddress("jassim@mydomain.com");
    // Specify the message content.
    MailMessage message = new MailMessage(from, to);
    message.Body = "This is a test e-mail message sent by an application. ";
    // Include some non-ASCII characters in body and subject. 
    string someArrows = new string(new char[] { '\u2190', '\u2191', '\u2192', '\u2193' });
    message.Body += Environment.NewLine + someArrows;
    message.BodyEncoding = System.Text.Encoding.UTF8;
    message.Subject = "test message 1" + someArrows;
    message.SubjectEncoding = System.Text.Encoding.UTF8;
    // Set the method that is called back when the send operation ends.
    client.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
    // The userState can be any object that allows your callback  
    // method to identify this send operation. 
    // For this example, the userToken is a string constant. 
    string userState = "test message1";
    client.SendAsync(message, userState);
    Console.WriteLine("Sending message... press c to cancel mail. Press any other key to exit.");
    string answer = Console.ReadLine();
    // If the user canceled the send, and mail hasn't been sent yet, 
    // then cancel the pending operation.

    // if (answer.StartsWith("c") && mailSent == false)
    // {
        // client.SendAsyncCancel();
    // }

    // Clean up.
    message.Dispose();
    Console.WriteLine("Goodbye.");
}

private void btnSend_Click(object sender, EventArgs e)
{
    // XtraMessageBox.Show("You are about to send this message to all contacts!", "Send", MessageBoxButtons.OK, MessageBoxIcon.Warning);

    if (XtraMessageBox.Show("Are you sure you want to send this message to all contacts now?", "Send", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
    {
        send_message();
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;


public class CartItem
{

    public Product Product;
    public int Quantity;

    public string Display()
    {
        return (Product.Name + (" ("
                    + (Quantity.ToString() + (" at "
                    + (FormatCurrency(Product.UnitPrice) + " each)")))));
    }
}

public static void Main(string [ ] args)
    {
      AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler ( ConsoleExceptionHandler.CurrentDomain_UnhandledExceptionConsole);
      AppDomain.CurrentDomain.AssemblyResolve += (AssemblyResolver.CurrentDomain_AssemblyResolve);

      Console.WriteLine ( typeof ( JobData ).ToString () );
      Console.WriteLine ( typeof ( TSExecTask ).ToString () );
      Console.WriteLine ( typeof ( ReportingTask).ToString () );
      Console.ReadLine ();
    }

public static void Main(string [ ] args)
    {
      AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler ( ConsoleExceptionHandler.CurrentDomain_UnhandledExceptionConsole);
      AppDomain.CurrentDomain.AssemblyResolve += (AssemblyResolver.CurrentDomain_AssemblyResolve);

      System.Threading.Thread.Sleep ( 100 );
      new ConsoleCrap ().WriteSome ();
      Console.ReadLine ();
    }