Thread Synchronization with Semaphore

using System;
using System.Windows.Forms;
using System.Threading;
namespace SemaphoreApp
{
    public partial class SemaphoreManager : Form
    {
        public SemaphoreManager()
        {
            InitializeComponent();
        }
        /// <summary>
        /// Description : No Synchronization
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnNoSync_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add("== No Synchronization ===========");
            int TotalThread = 5;
            Thread[] Threads = new Thread[TotalThread];
            for (int i = 0; i < TotalThread; i++)
            {
                Threads[i] = new Thread(new ThreadStart(AccessCode));
                Threads[i].IsBackground = true;
                Threads[i].Start();
            } 
        }
        /// <summary>
        /// Description : Synchronization with Minitor
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonMonitor_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add("== Using Monitor =============");
            int TotalThread = 5;
            Thread[] Threads = new Thread[TotalThread];
            for (int i = 0; i < TotalThread; i++)
            {
                Threads[i] = new Thread(new ThreadStart(AccessCodeWithMonitor));
                Threads[i].IsBackground = true;
                Threads[i].Start();
            }
        }
        /// <summary>
        /// Description : Synchronization with semaphore
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSemaphore_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add("== Using Semaphore =============");
            int TotalThread = 5;
            int SemaphoreCount = 3;
            Thread[] Threads = new Thread[TotalThread];
            Semaphore Sema = new Semaphore(SemaphoreCount, SemaphoreCount);

            for (int i = 0; i < TotalThread; i++)
            {
                Threads[i] = new Thread(new ParameterizedThreadStart(AccessCodewithSemaphore));
                Threads[i].IsBackground = true;
                Threads[i].Start(Sema);
            }
        }
        /// <summary>
        /// Description : Access Code with No Synchronization
        /// </summary>
        public void AccessCode()
        {
            listBox1.BeginInvoke(new ParameterizedThreadStart(UpdateUI), new object[] { "Thread ID : " + Thread.CurrentThread.ManagedThreadId.ToString() + " : Entered" });
            Thread.Sleep(500);
            listBox1.BeginInvoke(new ParameterizedThreadStart(UpdateUI), new object[] { "Thread ID : " + Thread.CurrentThread.ManagedThreadId.ToString() + " : Exit" });
        }
        /// <summary>
        /// Description : Access Code with Semaphore
        /// </summary>
        public void AccessCodeWithMonitor()
        {
            Monitor.Enter(this);
            try
            {
                listBox1.BeginInvoke(new ParameterizedThreadStart(UpdateUI), new object[] { "Thread ID : " + Thread.CurrentThread.ManagedThreadId.ToString() + " : Entered" });
                Thread.Sleep(500);
                listBox1.BeginInvoke(new ParameterizedThreadStart(UpdateUI), new object[] { "Thread ID : " + Thread.CurrentThread.ManagedThreadId.ToString() + " : Exit" });
            }
            finally
            {
                Monitor.Exit(this);
            }
        }
        /// <summary>
        /// Description : Access Code with Semaphore
        /// </summary>
        /// <param name="S"></param>
        public void AccessCodewithSemaphore(object objSemaphore)
        {
            bool IsComplete = false;
            Semaphore l_SemaPhore = (Semaphore)objSemaphore;
            while (!IsComplete)
            {
                if (l_SemaPhore.WaitOne(200, false))
                {
                    try
                    {
                        listBox1.BeginInvoke(new ParameterizedThreadStart(UpdateUI), new object[] { "Thread ID : " + Thread.CurrentThread.ManagedThreadId.ToString() + " : Entered" });
                        Thread.Sleep(500);
                    }
                    finally
                    {
                        l_SemaPhore.Release();
                        listBox1.BeginInvoke(new ParameterizedThreadStart(UpdateUI), new object[] { "Thread ID : " + Thread.CurrentThread.ManagedThreadId.ToString() + " : Exit" });
                        IsComplete = true;
                    }
                }
                else
                {
                    listBox1.BeginInvoke(new ParameterizedThreadStart(UpdateUI), new object[] { "Thread ID : " + Thread.CurrentThread.ManagedThreadId.ToString() + " : Waiting To enter" });
                }
            }
        }
        /// <summary>
        /// Description : Used To Update UI
        /// </summary>
        /// <param name="s"></param>
        public void UpdateUI(object s)
        {
            listBox1.Items.Add(s.ToString());
        }
    }
}