how can i get an image that i drawn on a picturebox? in my application i created a form with the freehand drawing.but i can't save the image that i drawn as a file,there have a error message that "object reference not set to an instance of an object".I am using the code

```
me.picturebox1.image.save(filename,sysytem.....jpeg)

```

any one knows please help me...thank you