ThreadStart, ParameterizedThreadStart Delegate

In Multithread programming, these are two methods that help create another Thread
1. ThreadStart This is a method that creates a new thread whose parameter is a ThreadStart delegate

 Thread t1 = new Thread(new ThreadStart(Multi));

where Multi is a method pointer with no parameters
2. ParameterizedThreadStart This is a method that creates a new Thread whose parameter is a ParameterizedThreadStart delegate

 Thread t2 = new Thread(new ParameterizedThreadStart(Add));
 t2.Start(ap); // Start running Thread and pass parameters

where Add is a method pointer containing parameters
See general examples

using System;
using System.Threading;

namespace AddWithThread
{
    class AddParams
    {
        public int a, b;
        public AddParams(int num1, int num2) 
        { 
            a = num1;
            b = num2;
        }
    }
    class Program
    {
        static void Multi()
        {
            //Xem id của thread khởi tạo bằng ThreadStart
            Console.WriteLine("ID of thread in Multi(): {0}", Environment.CurrentManagedThreadId);
        }
        static void Add(object? data)
        {
            if(data is AddParams ap)
            {
                //View the id of the thread initiated with ParameterizedThreadStart
                Console.WriteLine("ID of thread in Add(): {0}",Environment.CurrentManagedThreadId);
                //See results
                Console.WriteLine("{0} + {1} is {2}", ap.a, ap.b, ap.a + ap.b);
            }
        }
        public static void Main(string[] args)
        {
            // View main thread id
            Console.WriteLine("ID of thread in Main(): {0}",Environment.CurrentManagedThreadId);
           
            //Initialize ThreadStart
            Thread t1 = new Thread(new ThreadStart(Multi));
            t1.Start(); // Bắt đầu chạy Thread

            //Initialize ParameterizedThreadStart
            AddParams ap = new AddParams(10, 10);
            Thread t2 = new Thread(new ParameterizedThreadStart(Add));
            t2.Start(ap); //Start running Thread and pass parameters

            Thread.Sleep(5);
            Console.ReadLine();
        }
    }
}

Result: