read files in asp.net using c sharp

Thank you Iftikar, my question is: suppose am developping a webapplication where students will upload their assignments. I want to check if i can write a code which will be able to check among all assignments submitted on my webapplication if there is one student have made a copy of another student (i want to check if one student did a plagiarism from another one comparing those files uploaded on my webapplication).Thanks