kurec#2

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;

namespace CtoF
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

        }
        double[,] k = new double[4, 4];
        private void button1_Click(object sender, EventArgs e)
        {
            textBox2.Text = (double.Parse(textBox1.Text) * k[comboBox1.SelectedIndex, comboBox2.SelectedIndex]).ToString();
            //if (comboBox1.Text == "feet" && comboBox2.Text == "feet")
            //{
            //    double feet = Double.Parse(textBox1.Text);
            //    feet = feet * 1;
            //    textBox2.Text = feet.ToString();
            //}
            //else if (comboBox1.Text == "feet" && comboBox2.Text == "yard")
            //{
            //    double feet = Double.Parse(textBox1.Text);
            //    double yard = feet * 0.3333;
            //    textBox2.Text = yard.ToString();
            //}


        }
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (comboBox1.Text != "")
            {
                button1_Click(sender, e);

            }
        }
        private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (comboBox2.Text != "")
            {
                button1_Click(sender, e);

            }
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            textBox1.Clear();
            textBox2.Clear();
            comboBox1.Text = "";
            comboBox2.Text = "";
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //comboBox1.Items.Add("");
            comboBox1.SelectedIndex = 0;
            comboBox2.SelectedIndex = 0;
            k[0, 0] = 1;
            k[0, 1] = 0.3333;
            k[0, 2] = 1.1989;
            k[0, 3] = 0.0001893;
            k[1, 0] = 3.5966;
            k[1, 1] = 0.0005682;
            k[1, 2] = 0.8341;
            k[1, 3] = 0.278;
            k[2, 0] = 1;
            k[2, 1] = 0.0001579;
            k[2, 2] = 1;
            k[2, 3] = 0.0001579;
            k[3, 0] = 1760;
            k[3, 1] = 1760;
            k[3, 2] = 6330;
            k[3, 3] = 1;

        }






    }
}