// open file dialog
OpenFileDialog open = new OpenFileDialog();
// image filters
open.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp";
if (open.ShowDialog() == DialogResult.OK) {
// display image in picture box
pictureBox1.Image = new Bitmap(open.FileName);
// image file path
textBox1.Text = open.FileName;
}