How to remove the mouse enter event

private void form_MouseClick(object sender, EventArgs e)
       {
           PictureBox picturebox = sender as PictureBox;
           SaveFileDialog savefile = new SaveFileDialog();
           savefile.Filter = @"Images|*.png";
           if (savefile.ShowDialog() == DialogResult.OK)
           {
               string filepath = Path.GetExtension(savefile.FileName);
               if (picturebox != null && filepath != null)
               {
                   Image image = picturebox.Image;
                   SaveImage(image, savefile.FileName);
               }
           }
           disable_clickevent();
       }
       private static void SaveImage(Image image, string destPath)
       {
           image.Save(destPath, System.Drawing.Imaging.ImageFormat.Png);
       }
       private void savaImageToolStripMenuItem_Click(object sender, EventArgs e)
       {
           pictureBox1.MouseEnter += form_MouseClick;
           pictureBox2.MouseEnter += form_MouseClick;
       }
       private void disable_clickevent()
       {
           pictureBox1.MouseEnter -= form_MouseClick;
           pictureBox2.MouseEnter -= form_MouseClick;
       }