public string filepath;        public Form1()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)        {            openFileDialog1.Filter = "*.gif|*.jpg";            if (this.openFileDialog1.ShowDialog() == DialogResult.OK)            {                string  path = this.openFileDialog1.FileName;                 filepath=Path.GetDirectoryName(path);                 FileInfo f = new FileInfo(path);                this.listBox1.Items.Add(f.Name);            }        }        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)        {            pictureBox1.Image = Image.FromFile(filepath + "\\" + listBox1.SelectedItem.ToString());        }