Перемещение мышкой PictureBox'а по форме

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Up)
    {
        pictureBox1.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y - 10);
    }
}

private Point MouseDownLocation;
        private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
            {
                MouseDownLocation = e.Location;
            }
        }
 
        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
            {
                pictureBox1.Left = e.X + pictureBox1.Left - MouseDownLocation.X;
                pictureBox1.Top = e.Y + pictureBox1.Top - MouseDownLocation.Y;
            }
        }