c#图片浏览器代码

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 图片浏览器
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }
        int currentPictureIndex;
        Point oldPosition = new Point();
        private void btnSelectPicture_Click(object sender, EventArgs e)
        {
            if (ofdSelectPicture.ShowDialog() == DialogResult.OK)
            {
                picShowPicture.Image = Image.FromFile(ofdSelectPicture.FileNames[0]);
                currentPictureIndex = 0;
            }
        }

        private void btnQuit_Click(object sender, EventArgs e)
        {