C#

 using System;<br />
using System.Collections;<br />
using System.Text;<br />
using System.Threading;<br />
<br />
namespace A1_SS<br />
{<br />
    class Program<br />
    {<br />
        static object lockObject;<br />
        static ArrayList space;<br />
<br />
        static void Main()<br />
        {<br />
<br />
            space = new ArrayList();<br />
<br />
            for (int i = 1; i <= 1000; i++)<br />
            {<br />
                space.Add(i);<br />
<br />
            }<br />
<br />
            lockObject = new object();<br />
<br />
            <br />
                Thread t1 = new Thread(new ParameterizedThreadStart(Program.AccessData));<br />
                t1.Start(space);<br />
<br />
                Thread t2 = new Thread(new ParameterizedThreadStart(Program.AccessData));<br />
                t2.Start(space);<br />
<br />
                Thread t3 = new Thread(new ParameterizedThreadStart(Program.AccessData));<br />
                t3.Start(space);<br />
<br />
                Thread t4 = new Thread(new ParameterizedThreadStart(Program.AccessData));<br />
                t4.Start(space);<br />
<br />
                Thread t5 = new Thread(new ParameterizedThreadStart(Program.AccessData));<br />
                t5.Start(space);<br />
            }<br />
<br />
            Thread.Sleep(20 * 1000);<br />
        }<br />
<br />
<br />
<br />
        public static void AccessData(object param)<br />
        {             <br />
<br />
            ArrayList list = (ArrayList)param;<br />
<br />
            lock (lockObject)<br />
            {<br />
                <br />
<br />
                    Random rand = new Random();<br />
<br />
                    int x = rand.Next(1, list.Count);<br />
                    list.Remove(x);<br />
                    Console.WriteLine("x = " + x);<br />
<br />
                    int y = rand.Next(1, list.Count);<br />
                    list.Remove(y);<br />
                    Console.WriteLine("y = " + y);<br />
<br />
                    int newNumber = x + y;<br />
                    Console.WriteLine("newNumber = " + newNumber);<br />
<br />
                    list.Add(newNumber);<br />
<br />
<br />
<br />
                    foreach (object obj in list)<br />
                        Console.WriteLine(obj);<br />
                <br />
<br />
            }<br />
<br />
<br />
<br />
        }<br />
    }<br />
}<br />

private Tabs()<br />
{<br />
MessageBox.Show("begin");<br />
//<br />
// Required for Windows Form Designer support<br />
//<br />
InitializeComponent();<br />
panel1.Visible = false;<br />
tabControl1.Visible = true;<br />
...}

InitializeComponent()<br />
{<br />
MessageBox.Show("start-ic");<br />
...<br />
}