need help very soooooooooooon in parsing of text files

Question

hi i have 2 perform xml parsing of IIS log files using C# can someone plz guide me tht what 2 study for this purpose as i hav to do it within three days and i kno less about C#.if someone can also provide me its relative code plzzzzzzzzzzzzzzzzzzzzzzzzzz.n if not very relative 2 IIS log files but these r kind of text files so kindlyyyyyyyyyyyy guide me in parsing text files.
waitin 4 some positive response.