Decorator Pattern (A Layman to Laymen)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DecoratorPatternDemo
{
    public partial class Form1 : Form
    {
        private string filePath = @"C:\mysample.txt";

        public Form1()
        {
            InitializeComponent();
        }

        private void disableReaders(Button btn)
        {
            foreach (Control ctrl in this.grpReaders.Controls)
            {
                if (!ctrl.Equals(btn))
                    ctrl.Enabled = false;
            }
        }

        private void bnMsgWriter_Click(object sender, EventArgs e)
        {

            if (!string.IsNullOrEmpty(this.txtMessage.Text))
            {
                this.ClearDetails();
                this.bnMessageReader.Enabled = true;
                this.disableReaders(this.bnMessageReader);
                this.txtCode.Text = "IMessageWriter mw = new MessageWriter();";
                
                //////
                IMessageWriter mw = new MessageWriter();
                mw.Message = this.txtMessage.Text;
                mw.WriteMessage(this.filePath);
            }

        }

        private void ClearDetails()
        {
            this.txtCode.Text = string.Empty;
            this.txtContents.Text = string.Empty;
        }

        private void bnSecureMsg_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(this.txtMessage.Text))
            {
                this.ClearDetails();
                this.bnSecureMsgReader.Enabled = true;
                this.disableReaders(this.bnSecureMsgReader);
                this.txtCode.Text = "IMessageWriter mw = new SecureMessageReader(new MessageWriter());";

                //////
                IMessageWriter mw = new SecureMessageWriter(new MessageWriter());
                mw.Message = this.txtMessage.Text;
                mw.WriteMessage(this.filePath);
            }

        }

        private void bnEncryptedMsg_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(this.txtMessage.Text))
            {
                this.ClearDetails();
                this.bnEncryptedMsgReader.Enabled = true;
                this.disableReaders(this.bnEncryptedMsgReader);
                this.txtCode.Text = "IMessageWriter mw = new EncryptedMessageWriter(new MessageWriter());";

                //////
                IMessageWriter mw = new EncryptedMessageWriter(new MessageWriter());
                mw.Message = this.txtMessage.Text;
                mw.WriteMessage(this.filePath);
            }

        }

        private void bnSecureEncryptMsg_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(this.txtMessage.Text))
            {
                this.ClearDetails();
                this.bnSecureEncMsgReader.Enabled = true;
                this.disableReaders(this.bnSecureEncMsgReader);
                this.txtCode.Text = "IMessageWriter mw = new SecureMessageWriter(new EncryptedMessageWriter(new MessageWriter()));";

                //////
                IMessageWriter mw = new SecureMessageWriter(new EncryptedMessageWriter(new MessageWriter()));
                mw.Message = this.txtMessage.Text;
                mw.WriteMessage(this.filePath);
            }

        }

        private void bnMessageReader_Click(object sender, EventArgs e)
        {
            IMessageReader reader = new MessageReader();
            this.txtCode.Text = "IMessageReader reader = new MessageReader();";

            this.txtContents.Text = reader.ReadMessage(filePath);
        }

        private void bnSecureMsgReader_Click(object sender, EventArgs e)
        {
            IMessageReader reader = new SecureMessageReader(new MessageReader());
            this.txtCode.Text = "IMessageReader reader = new SecureMessageReader(new MessageReader());";
            this.txtContents.Text = reader.ReadMessage(filePath);
        }

        private void bnEncryptedMsgReader_Click(object sender, EventArgs e)
        {
            IMessageReader reader = new EncryptedMessageReader(new MessageReader());
            this.txtCode.Text = "IMessageReader reader = new EncryptedMessageReader(new MessageReader());";
            this.txtContents.Text = reader.ReadMessage(filePath);
        }

        private void bnSecureEncMsgReader_Click(object sender, EventArgs e)
        {
            IMessageReader reader = new SecureMessageReader(new EncryptedMessageReader(new MessageReader()));
            this.txtCode.Text = "IMessageReader reader = new SecureMessageReader(new EncryptedMessageReader(new MessageReader()))";
            this.txtContents.Text = reader.ReadMessage(filePath);
        }
    }
}