c# 文件处理

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace demo20240123
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == string.Empty)
            {
                MessageBox.Show("内容为空");
            }
            else {
                if (File.Exists(textBox1.Text))
                {
                    MessageBox.Show("已经存在");
                }
                else {
                    File.Create(textBox1.Text);
                }
            }

        }
    }
}