Access Network folder ASP.net

Hi all
I am developing a funtion to let user download files in Network Folder:
Currently, I have 2 user, User01: domain01\user0001 (pass: 123456), User02: domain01\user0002 (pass: abc)
I have 2 shared network folder: \\Server01\Shared folder 01 (User01 have full permission, User02 can not access), and \\Server01\Shared Folder 02 (User02 have full permission, User01 can not access), and \\Server01\Shared folder 02 both can access

I hope like this:
I must use Login control (ASP.Net) for user to input their Active Directory Login.
After login, I will use a form to list all files in these folders with user permission (I mean who does not have permision will not be able to see content of that folder)
So what I need is:
DirectoryInfo dirInfo01 = new DirectoryInfo(\\Server01\Shared folder 01); //pass for User01, User02 must fail

DirectoryInfo dirInfo01 = new Directory ...