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

Hi Roei Bar,
U said it is impossible to compare images on such short span of time(2 sec), is it possible to compare if the time span is 2 hours
and   is it possible to save those photos to in my c drive mypictures folder
and u said to run ocr program give me any links u have about that ocr program
I have written the following code to compare the images
timer1_tick (i have put this code in timer)
{
string img1_ref, img2_ref;
img1 = new Bitmap("c:\\dd.jpg"); //it is working fine in this way but i want to take img1 as previous image and img2 as current image and i will do the comparison and i want to interchange the img1 and img2 then current image becomes  previous image img1 and img2 gets the new image from webcam like this i want to comapre continuously but it's not working plss tell me this way is possible or not with small modifications
img2 = new Bitmap(e.WebCamImage); //is image interchanging is possible simply giving img1=img2; is not working
 
if (img1.Width == img2.Width && img1.Height == img2.Height)
{
for (int i = 0; i < img1.Width; i++)
{
for (int j = 0; j < img1.Height; j++)
{
img1_ref = img1.GetPixel(i, j).ToString();
img2_ref = img2.GetPixel(i, j).ToString();
if (img1_ref != img2_ref)
{
count2++;
flag = false;
break;
}
count1++;
}
// progressBar1.Value++;
}
if (flag == false)
MessageBox.Show("Sorry, Images are not same , " + count2 + " wrong pixels found");
else
MessageBox.Show(" Images are same , " + count1 + " same pixels found and " + count2 + " wrong pixels found");
}
else
{
MessageBox.Show("can not compare this images");
}
img1 = img2;

}

well my friend, it is literally impossible to compare images on such short period of time, you need to run an OCR program which compares pixels and that takes time by image size and density