System Threading C# by API

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime;
using System.Runtime.CompilerServices;
using System.Security;
using System.Text;
using System.Threading;
public class MainClass
{
    
    public static void Main()
    {
       ReaderWriterLock rwLock = new ReaderWriterLock();
        rwLock.AcquireWriterLock(250);
        if (rwLock.IsWriterLockHeld)
        {
            Console.WriteLine("Writer lock held");
            rwLock.ReleaseWriterLock();
        }
        rwLock.ReleaseWriterLock();
    }
}