Interaction Between Content Page and Master Page

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class MasterPage : System.Web.UI.MasterPage
{
    
    protected void Page_Load(object sender, EventArgs e)
    {
        txtMasterBox1.Focus();
    }


   
    //expose controls on master page as public properties
    public TextBox PropertyMasterTextBox1
    {
        get { return txtMasterBox1; }
        set { txtMasterBox1 = value; }
    }
    public TextBox PropertyMasterTextBox2
    {
        get { return txtMasterBox2; }
        set { txtMasterBox2 = value; }
    }
    public Button PropertyMasterButton1
    {
        get { return btnMasterButton1; }
    }
    public Button PropertyMasterButton2
    {
        get { return btnMasterButton2; }
    }

    //expose public methods on master page for content page to call
    public void SetMasterBox1Value(string myText)
    {
        txtMasterBox1.Text = myText;
    }
    public string GetMasterbox1Value()
    {
        return txtMasterBox1.Text;
    }
    public void SetMasterBox2Value(string myText)
    {
        txtMasterBox2.Text = myText;
    }
    public string GetMasterBox2Value()
    {
        return txtMasterBox2.Text;
    }
}