class SimpleClass
{
    // Static variable that must be initialized at run time.
    static readonly long baseline;

    // Static constructor is called at most one time, before any
    // instance constructor is invoked or member is accessed.
    static SimpleClass()
    {
        baseline = DateTime.Now.Ticks;
    }
}

public class Bus
 {
     // Static variable used by all Bus instances.
     // Represents the time the first bus of the day starts its route.
     protected static readonly DateTime globalStartTime;

     // Property for the number of each bus.
     protected int RouteNumber { get; set; }

     // Static constructor to initialize the static variable.
     // It is invoked before the first instance constructor is run.
     static Bus()
     {
         globalStartTime = DateTime.Now;

         // The following statement produces the first line of output, 
         // and the line occurs only once.
         Console.WriteLine("Static constructor sets global start time to {0}",
             globalStartTime.ToLongTimeString());
     }

     // Instance constructor.
     public Bus(int routeNum)
     {
         RouteNumber = routeNum;
         Console.WriteLine("Bus #{0} is created.", RouteNumber);
     }

     // Instance method.
     public void Drive()
     {
         TimeSpan elapsedTime = DateTime.Now - globalStartTime;

         // For demonstration purposes we treat milliseconds as minutes to simulate
         // actual bus times. Do not do this in your actual bus schedule program!
         Console.WriteLine("{0} is starting its route {1:N2} minutes after global start time {2}.",
                                 this.RouteNumber,
                                 elapsedTime.TotalMilliseconds,
                                 globalStartTime.ToShortTimeString());
     }
 }

 class TestBus
 {
     static void Main()
     {
         // The creation of this instance activates the static constructor.
         Bus bus1 = new Bus(71);

         // Create a second bus.
         Bus bus2 = new Bus(72);

         // Send bus1 on its way.
         bus1.Drive();

         // Wait for bus2 to warm up.
         System.Threading.Thread.Sleep(25);

         // Send bus2 on its way.
         bus2.Drive();

         // Keep the console window open in debug mode.
         System.Console.WriteLine("Press any key to exit.");
         System.Console.ReadKey();
     }
 }
 /* Sample output:
     Static constructor sets global start time to 3:57:08 PM.
     Bus #71 is created.
     Bus #72 is created.
     71 is starting its route 6.00 minutes after global start time 3:57 PM.
     72 is starting its route 31.00 minutes after global start time 3:57 PM.      
*/

using System.Net;
using System.Net.Sockets;
using System.Reflection;

namespace SuperSocket.ClientEngine
{
    public static partial class ConnectAsyncExtension
    {
        private static readonly MethodInfo m_ConnectMethod;

        private static bool m_OSSupportsIPv4;

        static ConnectAsyncExtension()
        {
            //.NET 4.0 has this method but Mono doesn't have
            m_ConnectMethod = typeof(Socket).GetMethod("ConnectAsync", BindingFlags.Public | BindingFlags.Static);

            //Socket.OSSupportsIPv4 doesn't exist in Mono
            var pro_OSSupportsIPv4 = typeof(Socket).GetProperty("OSSupportsIPv4", BindingFlags.Public | BindingFlags.Static);

            if (pro_OSSupportsIPv4 != null)
            {
                m_OSSupportsIPv4 = (bool)pro_OSSupportsIPv4.GetValue(null, new object[0]);
            }
            else
            {
                m_OSSupportsIPv4 = true;
            }
        }

        public static void ConnectAsync(this EndPoint remoteEndPoint, ConnectedCallback callback, object state)
        {
            //Socket.ConnectAsync(SocketType.Stream, ProtocolType.Tcp, e);
            //Don't use Socket.ConnectAsync directly because Mono hasn't implement this method
            if (m_ConnectMethod != null)
                m_ConnectMethod.Invoke(null, 
                    new object[]
                    {
                        SocketType.Stream,
                        ProtocolType.Tcp,
                        CreateSocketAsyncEventArgs(remoteEndPoint, callback, state)
                    });
            else
            {
                ConnectAsyncInternal(remoteEndPoint, callback, state);
            }
        }

        static partial void CreateAttempSocket(DnsConnectState connectState)
        {
            if (Socket.OSSupportsIPv6)
                connectState.Socket6 = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);

            if (m_OSSupportsIPv4)
                connectState.Socket4 = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        }
    }
}