C# why does the "called object has been disconnected from clients" error occur?

Question

IT education

Good day!
While studying the manual on the basics of operating systems, I came across a problem that occurs when using lock statements; monitor.enter()..., ; etc.
More specifically

pikcha

I dug for a long time in search of an answer (I'm a beginner myself and I don't have enough experience to figure out this problem) I'm
attaching the code ...

source

class Program
    {
        static int Runs = 0;
        static object block = new object();
        static void Main()
        {
            Thread t2 = new Thread(new ThreadStart(Method))
            {
                Name = "Thread 2"
            };
            Thread t3 = new Thread(new ThreadStart(Method))
            {
                Name = "Thread 3"
            };
            t2.Start();
            t3.Start();
            Console.ReadLine();
            

        }
        public static void Method()
        {
            try
            {
                Monitor.Enter(block);
                int Temp = Runs;
                Temp++;
                Console.WriteLine(Thread.CurrentThread.Name + " {0}", Temp);
                Thread.Sleep(1000);
                Runs = Temp;
            }
            finally
            {
                Monitor.Exit(block);
            }
        }
    }

Answer 1

Your code worked fine for me.
Look for the problem in the studio, rights. Try running the studio with admin rights.