How to save the image into the c drive of my pc capturing continuosly from a webcam using C# code

Question

Hi,
iam getting the webcam images in the picturebox using bellow code for every 2 seconds , but i want to save them in my pc's c drive how to save the images in to my c drive as a bitmap image
private void WebCamCapture_ImageCaptured(object source, WebCam_Capture.WebcamEventArgs e)
{
// set the picturebox picture
this.pictureBox1.Image = e.WebCamImage;
}
i want to save the image e.wabcamimage to my c drive for every 2 seconds by saving all the images i want to compare the image with its previous image
otherwise plss tell me any other way to compare the image with its previous image (for every two seconds i will get the new image)
thanks in advance please help me