1

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

namespace ex._1
{
    public partial class Form1 : Form
    {
        public delegate void MyDelegate(string strName);
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        public void MyMessage(string str)
        {
            MessageBox.Show(str, "MyMessage", MessageBoxButtons.YesNo,MessageBoxIcon.Information);

        }

        private void button2_Click(object sender, EventArgs e)
        {
            string[] myStr = { "one", "two", "three" };
            MyDelegate delegate1 = new MyDelegate(MyMessage);
            foreach (string str1 in myStr)
            {
                delegate1(str1);
            }
        }

        private void PictureMethod(string str2)
        {
            pictureBox1.Refresh();
            pictureBox1.Load(str2);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            MyDelegate delegate2 = new MyDelegate(PictureMethod);

            foreach(string s in listBox1.Items)
            {
                delegate2(s);
                System.Threading.Thread.Sleep(2000);
            }
        }
    }
}