C Sharp —

Using Monitor Locks with the C# lock Statement

Although the C# lock statement doesn't support the full array of features found in the Monitor class, it does enable you to obtain and release a monitor lock. To use the lock statement, simply specify the lock statement with the code being serialized in braces. The braces indicate the starting and stopping point of the code being protected, so there's no need for an unlock statement. The following code will produce the same synchronized output as the previous examples: -

using System;
using System.Threading;
class Database
{
    public void SaveData(string text)
    {
        lock(this)
        {
            Console.WriteLine("Database.SaveData - Started");
            Console.WriteLine("Database.SaveData - Working");
            for (int i = 0; i < 100; i++)
            {
                Console.Write(text);
            }
            Console.WriteLine("\nDatabase.SaveData - Ended");
        }
    }
}
class ThreadLockApp
{
    public static Database db = new Database();
    public static void WorkerThreadMethod1()
    {
        Console.WriteLine("Worker thread #1 - Started");
        Console.WriteLine
            ("Worker thread #1 - Calling Database.SaveData");
        db.SaveData("x");
        Console.WriteLine("Worker thread #1 - Returned from Output");
    }
    public static void WorkerThreadMethod2()
    {
        Console.WriteLine("Worker thread #2 - Started");
        Console.WriteLine
            ("Worker thread #2 - Calling Database.SaveData");
        db.SaveData("o");
        Console.WriteLine("Worker thread #2 - Returned from Output");
    }
    public static void Main()
    {
        ThreadStart worker1 = new ThreadStart(WorkerThreadMethod1);
        ThreadStart worker2 = new ThreadStart(WorkerThreadMethod2);
        Console.WriteLine("Main - Creating worker threads");
        Thread t1 = new Thread(worker1);
        Thread t2 = new Thread(worker2);
        t1.Start();
        t2.Start();
    }
}