C# pick most recent file returning “most recent” based on ti

Question

Hi Guys , I'm trying to find an answer to my problem which can be viewed here http://stackoverflow.com/questions/17484683/c-sharp-pick-most-recent-file-returning-most-recent-based-on-title-rather-than   basically I want to go into a directory and find a number of files , if there are similarly named files I then want to pick the most recent , the code in the question seen in the link works for dividing but divides based on the title rather than by the time and I have absolutly no clue why