[C#] 18일차 - 131. 텍스트박스, 레이블, 버튼 컨트롤

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 A131_BasicControls
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
                MessageBox.Show("이름을 입력하세요", "Warning");
            else
                label2.Text = textBox1.Text + "님! 안녕하세요!";
        }
    }
}