Adding one ppt file to another ppt file

Question

I have got the task that if their i have one "power point file1" in desktop or any other location in computer, i need to create new "power point file2 " in asp.net and c# and add all the images of the "power point file1" into "power point file2" and also i should be able to edit the "power point file2" .so could you please send me the full code in c# and in asp.net..i have been searching for three days but couldnt find the answer.