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 WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private bool hasChanged;
        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (!hasChanged) hasChanged = true;
            else return;
            if (((CheckBox)sender).Name.EndsWith("1"))
            {
                checkBox2.Checked = !checkBox2.Checked; if (checkBox2.Checked) checkBox2.Enabled = false;
                else checkBox2.Enabled = true;
                checkBox3.Checked = !checkBox3.Checked; if (checkBox3.Checked) checkBox3.Enabled = false;
                else checkBox3.Enabled = true;
                if (checkBox1.Checked)  checkBox1.Enabled = false;
                hasChanged = false;
            }
            else if (((CheckBox)sender).Name.EndsWith("2"))
            {
                checkBox3.Checked = !checkBox3.Checked; if (checkBox3.Checked) checkBox3.Enabled = false;
                else checkBox3.Enabled = true;
                checkBox4.Checked = !checkBox4.Checked; if (checkBox4.Checked) checkBox4.Enabled = false;
                else checkBox4.Enabled = true;
                if (checkBox2.Checked) checkBox2.Enabled = false;
                hasChanged = false;
            }
            else if (((CheckBox)sender).Name.EndsWith("3"))
            {
                checkBox4.Checked = !checkBox4.Checked; if (checkBox4.Checked) checkBox4.Enabled = false;
                else checkBox4.Enabled = true;
                checkBox5.Checked = !checkBox5.Checked; if (checkBox5.Checked) checkBox5.Enabled = false;
                else checkBox5.Enabled = true;
                if (checkBox3.Checked) checkBox3.Enabled = false;
                hasChanged = false;
            }
            else if (((CheckBox)sender).Name.EndsWith("4"))
            {
                checkBox5.Checked = !checkBox5.Checked; if (checkBox5.Checked) checkBox5.Enabled = false;
                else checkBox5.Enabled = true;

                ////
                checkBox1.Checked = !checkBox1.Checked; if (checkBox1.Checked) checkBox1.Enabled = false;
                else checkBox1.Enabled = true;
                ///

                if (checkBox4.Checked) checkBox4.Enabled = false;
                hasChanged = false;
            }
            ///
            else
            {
                checkBox1.Checked = !checkBox1.Checked; if (checkBox1.Checked) checkBox1.Enabled = false;
                else checkBox1.Enabled = true;
                checkBox2.Checked = !checkBox2.Checked; if (checkBox2.Checked) checkBox2.Enabled = false;
                else checkBox2.Enabled = true;
                if (checkBox5.Checked) checkBox5.Enabled = false;
                hasChanged = false;
            }
            ///
        }
    }
}