save image of picturebox control?

Question

hi,
  i am developing windows application in that application i am taking one picturebox, openfiledialogue, loadimage button and saveimage button
 for loadimage button i write code like
 openfiledialogue1.showdialogue()
 picturebox1.load(openfiledialogue1.filename)
 this time image is displayed in picturebox this is fine.
 but my aim is that picturebox image is saved in one folder. how todo  it. not to use of savedialogue control.
 please give a sample solution.
Thanks