Как передавать значения между usercontrols в C#

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So i've a Form1 with three UserControl's as UC1,UC2 & UC3. Form1 contains a Button, UC1 and UC3. Both UC1 & UC3 are initially hidden when the application runs and the Form1 button click event makes the UC1 visible. UC1 contains a panel and inside the UC1 load event I'm adding UC2 into the panel through panel.Controls.Add() method at application run time. UC2 contains a Button and the click event of this button makes UC3 visible in Form1. UC3 contain a textbox. Now when I click the UC2 Button, I want it to pass a string value to UC3 textbox. How do I do that? or generally I need a simple solution to send values from one UserControl to another UserControl.

Вот весь мой код...

Форма form1.в CS

namespace Problem
{
   public partial class Form1 : Form
  {

     public Form1()
     {
        InitializeComponent();
        uC11.u3Visible += UC11_u3Visible;// Event came from UC1
     }

     private void UC11_u3Visible(object sender, EventArgs e)
     {
        uC31.Visible = true;
        uC11.Visible = false;
     }

     private void button1_Click(object sender, EventArgs e)
     {
        uC11.Visible = true;
     }
  }
}

UC1.в CS

namespace Problem
{
  public partial class UC1 : UserControl
  {
      public event EventHandler u3Visible;//Declaring a public event
      public UC1()
      {
         InitializeComponent();
      }

      private void UC1_Load(object sender, EventArgs e)
      {
          UC2 xy = new UC2();
          xy.Name = "UsrCntrl2";
          xy.Location = new Point(18, panel1.Controls.Count * 73);
          panel1.Controls.Add(xy);// Adding UC2 in UC1
          xy.open += Xy_open;// UC2 button click event
      }

      private void Xy_open(object sender, EventArgs e)
      {
          EventHandler handler = u3Visible;
          if (handler != null)
          {
              handler(this, new EventArgs());// Creating another event to make UC3 visible 
              //upon button click from UC2.
          }
      }
   }
}

Файлов uc2.в CS

namespace Problem
{
   public partial class UC2 : UserControl
 {

    public event EventHandler open;//Declaring a public event
    public UC2()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        EventHandler handler = open;
        if (handler != null)
        {
            handler(this, new EventArgs());// Button click sending this event
        }
        string text = "Hello There!";// "I want this string to pass into UC3 textbox"
        var ass = new UC3(text);


    }
  }
}

МК UC3.в CS

namespace Problem
{
   public partial class UC3 : UserControl
{
    public UC3()
    {
        InitializeComponent();
    }
    public UC3(string text)
    {
        InitializeComponent();
        TB.Text = text;// why textbox not showing this value?
        MessageBox.Show(text);// while this MessageBox showing it!
    }
  }
}

Что я уже пробовал:

Я застрял с этой проблемой на столько часов. Я пробовал гуглить, чтобы найти соответствующие решения, но ничего такого полезного не придумал. Так что пришлось выложить его здесь. Любая помощь будет очень признательна. Заранее спасибо!

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