Why doesn't the second thread start when using the TryEnter() construct?

Question

C++ / C#

using System;
using System.Threading;


class Demo 
{
    static int Count;
    static object Locker = new object();
    static void Main() 
    {
        Thread ob = new Thread(Run);
        ob.Name = "first ";
        Thread ob1 = new Thread(Run);
        ob1.Name = "second ";
        ob.Start();
        ob1.Start();
        ob.Join();
        ob1.Join();
    }

    public static void Run() 
    {
        if (Monitor.TryEnter(Locker)) 
        {
            do
            {
                Thread.Sleep(100);
                Console.WriteLine(Thread.CurrentThread.Name + " вошел " + Count);
                Count++;

            } while (Count < 10);
            Console.WriteLine(Thread.CurrentThread.Name + " закончил свою работу");
            Count = 0;
            Monitor.Exit(Locker);
        }
        else 
        {
            Console.WriteLine("Не вошел " + Thread.CurrentThread.Name);
        }
    }
        
}

Actually, one of the threads is blocked by the object object, but when this thread finishes its work, the whole process stops. Why doesn't the second thread enter the critical region?

Answer 1

Well, apparently because the second thread failed to capture the lock, it went to the else branch and, after displaying the message, completed its work, because there are no more instructions in the body of the Run function.
It's strange that you ask this if you wrote this code.