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 WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
this.BackColor = Color.Red;
checkBox1.Checked = false;
}
}
private void button2_Click(object sender, EventArgs e)
{
if (checkBox2.Checked)
{
this.BackColor = Color.Green;
checkBox2.Checked = false;
}
}
private void button3_Click(object sender, EventArgs e)
{
if (checkBox3.Checked)
{
this.BackColor = Color.Blue;
checkBox3.Checked = false;
}
}
private void button4_Click(object sender, EventArgs e)
{
if (checkBox4.Checked)
{
this.BackColor = Color.Yellow;
checkBox4.Checked = false;
