Stackoverflow 28125983, C#

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//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading;

namespace Rextester
{
    public class Program
    {
        static object obj = new object();
        static void m1()
        {
            lock(obj)
            {
                Monitor.Enter(obj);
                Console.WriteLine("m1");
            }
        
            Console.WriteLine("m1 has lock on obj: ", Monitor.IsEntered(obj));
        }

static void m2()
        {
            lock (obj)
            {
                Console.WriteLine("m2");
                Monitor.Pulse(obj);
            }
        }
        
        public static void Main(string[] args)
        {
            Thread t1 = new Thread(m1);
            Thread t2 = new Thread(m2);
            t1.Start();
            t2.Start();    
            
            t1.Join();
            Console.WriteLine("t1 ended");
            t2.Join();
            Console.WriteLine("t2 ended");
            
            //Your code goes here
            Console.WriteLine("mainthread ended");
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0.09 sec, absolute running time: 10.02 sec, cpu time: 0.05 sec, average memory usage: 23 Mb, average nr of threads: 7