i wanna create some files that must have unique names..they will serv as index for some working..now my question is how do i make that they will have unique filenames? i found the following method System.DateTime.Now.ToFileTime() which by what they says creates a long type number(i checked it) by the time of the computer system..so this should be always different..or not? how do u usually do? can i use System.DateTime.Now.ToFileTime() without worries?