C#中，（winform）进度条对象的赋值不是引用的赋值吗？

我的源代码在这里，虽然太长没人看。

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

using System.Threading;/*线程相关*/
using System.Windows.Forms;/*窗体相关*/
using System.Timers;/*计时器相关*/

namespace myWinform1
{
    class play:Form1
    {
        private const int playerNums = 3;
        private ParameterizedThreadStart[] games;
        private Thread[] gameReady = new Thread[playerNums];
        private ProgressBar[] track = new ProgressBar[playerNums];
        private Player[] playerArray = new Player[playerNums];
        private System.Timers.Timer t = new System.Timers.Timer();
        private static List<int> greads = new List<int>();

        public System.Timers.Timer Tim
        {
            get { return t; }
        }
        public Thread[] GameReady
        {
            get { return gameReady; }
        }
        public int PlayerNums
        {
            get{ return playerNums; }
        }
        public Player[] PlayerArray
        {
            get { return playerArray; }
        }
        public play(/* int paraPlayerNums = 3 */)
        {
            /*设置计时器*/
            t.Interval = 1000;/*间隔*/
            t.Elapsed += new System.Timers.ElapsedEventHandler(Timer_Func);/*到达时间应该执行的事件*/
            t.Enabled = true; /*允许执行事件*/
            t.AutoReset = true; /*不仅仅执行1次，而是始终执行。*/

            ///*设置比赛人数。默认3人*/
            //this.playerNums = paraPlayerNums;
            /*创建比赛进程*/
            this.games = new ParameterizedThreadStart[] { null,null,null };
            /*创建赛道*/
            this.track = new ProgressBar[] { progressBar1, progressBar2, progressBar3 };
            /*分配*/
            for (int i = 0; i < playerNums; i++)
            {
                /*每个赛道一个进程*/
                games[i] = new ParameterizedThreadStart(gameStart_threadFunc);
                /*设置队员属性*/
                playerArray[i] = new Player(i.ToString() , i , i+6);
                /*设置进程*/
                gameReady[i] = new Thread(games[i]);
                /*为队员分配赛道*/
                playerArray[i].Track = track[i]; // fixme ：这里应该用引用赋值。还是本身就是引用赋值？为什么传递不过去？（C#中如何做到引用赋值？)
            }
        }

        ~play()
        { 
            //todo: 销毁函数。包括线程，被创建对象等等。

        }
        /*进程函数（比赛进行中）*/
        static bool isTimeReach = true;
        public static void gameStart_threadFunc(object obj)
        {
            /*处理传入参数*/
            Player p = obj as Player;
            while (!p.IsWiner)
            {
                if (isTimeReach)
                {
                    int step = p.OneStep;
                    /*处理进度条可能溢出情况*/
                    if (step > p.Track.Maximum - p.Track.Value) 
                    {
                        p.Track.Value = p.Track.Maximum;
                        step = 0;
                        p.IsWiner = true;
                        if (-1 == greads.IndexOf(p.ID)) // fixme :there is a bug.
                        {
                            greads.Add(p.ID);
                            p.showGread();
                        }
                    }
                    /*开始移动*/
                    if (step < 0 && p.Track.Value < (-1*step))
                    {
                        step = 0;
                    }
                    else
                    {
                        p.Track.Value += step;
                    }
                    isTimeReach = false;
                }
            }
        }
        private void Timer_Func(object sender, System.Timers.ElapsedEventArgs e)
        {
            isTimeReach = true;
            //Invalidate(false);
        }  

    }
}

sadasdasdasdsadasd

 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace myWinform1
{
    class Player : Form1
    {
        private string name = "";
        private int id = -1;
        private bool isWiner = false;
        private int gread = -1;
        private int attackPotential = 0;
        private int distance = 0;
        private ProgressBar track = new ProgressBar();
        private int oneStep = 0;
        private int baseStep = 6;
        private Random ra = new Random();
        public int Gread 
        {
            get { return gread; }
            set { Gread = gread; }
        }
        public bool IsWiner
        {
            get { return isWiner; }
            set { isWiner = IsWiner; }
        }
        public int AttackPotential
        {
            get { return attackPotential; }
            set { attackPotential = AttackPotential; }
        }
        public int ID
        {
            get { return id; }
        }
        public int Distance
        {
            get { return distance; }
            set { distance = Distance; }
        }
        public ProgressBar Track
        {
            get { return track; }
            set { track = Track; }
        }
        public int OneStep
        {
            get { return oneStep; }
            set { oneStep = OneStep; }
        }
        public Player()
        {
            name = "";
            isWiner = false;
            id = 0xff;
            gread = 0;
            attackPotential = 0; /*潜力值*/
            oneStep = ra.Next(baseStep - attackPotential , attackPotential);/*队员的每步移动距离。它是随机的。*/
        }
        public Player(string paraName, int paraID,int paraAttackPotential)
        {
            isWiner = false;
            gread = 0;

            name = paraName;
            id = paraID;
            attackPotential = paraAttackPotential;
            oneStep = ra.Next(baseStep - attackPotential, attackPotential);/*队员的每步移动距离。它是随机的。*/
        }
        ~Player()
        { 

        }

        public void showGread()
        {
            label2.Text = "No." + id.ToString() + "is" + gread.ToString();
        }
    }
}

asdasdasdas

         private void button4_Click(object sender, EventArgs e)
        {
            label2.Text = "";

            play p = new play();
            for (int i = 0 ; i < p.PlayerNums ; i++)
            {
                 p.GameReady[i].Start(p.PlayerArray[i]);
            }
            /*开启计时器*/
            p.Tim.Start();
        }