sad

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        double prime = 0;
        double root = 0;
        double secretkey = 0;
        double secretkey2 = 0;
        double commonkey = 0;
        double commonkey1 = 0;
        double commonkey2 = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            Random random1 = new Random();
            Random random2 = new Random();

            int randomNumber1 = random1.Next(100);
            int randomNumber2 = random2.Next(100);
            prime = Convert.ToDouble(textBox1.Text);
            root = Convert.ToDouble(textBox1.Text);
            secretkey = Math.Pow(root, randomNumber1) % prime;
            secretkey2 = Math.Pow(root, randomNumber2) % prime;
            commonkey1 = Math.Pow(secretkey2, randomNumber1) % prime;
            commonkey2 = Math.Pow(secretkey, randomNumber2) % prime;
            if (commonkey1 == commonkey2)
            {
                commonkey = commonkey1;
                textBox3.Text = "" + commonkey;


            }
        }
    }
}