อยากทราบแนวคิดการเขียนโปรแกรมเข้ารหัสด้วยภาษา C# ครับ

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
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string str;
            int x = 0, i = 0;
            str = textBox1.Text;

            if (str.Length > 0)
            {
                for (; i < str.Length-1; i++)
                {
                    if (str[i].ToString() == " ")
                    {
                        if (str[i + 1].ToString() != " ") x++;
                        else if (str[i + 1] == str.Length && str[i + 1].ToString() != " ") x++;
                    }
                }
                if (str[0].ToString() != " ") x++;
            }

            textBox2.Text = x.ToString();
        }
    }
}