file downloader from file hosting sites

I have a bunch of text files that contain links to file hosting sites such as rapidshare and mediafire. Some links are to mirrorcreator or similar sites that upload to many file hosting sites. Some text files contain many links, some just one. Most of the text files contain other text beside the links. The program I want done is to read the text file, and download the files from the links in the text file. Downloading should be easy to program since there is a free tool called jdownloader that takes care of it (it has scripts for interfacing with the various file hosting sites out there). It is possible to control jdownloader from the command line so the program should be able to use it that way. Captcha is not a problem since I will pay for a premium account on a file hosting site. The text files are located in different folders. The program should be able to traverse through the directory structure. The downloaded files should be put in a folder named download. Here is an example: Two files with links in them: c:\txt\link1\[login to view URL] c:\txt\link2\[login to view URL] [login to view URL] contains links for [login to view URL] and 2.rar. [login to view URL] contains a link for 3.rar. The user specifies that the root directory is c:\txt\. First when started, the program looks in the link1 directory, find [login to view URL] and sees that it has 2 links in [login to view URL] program creates c:\txt\link1\download\ and downloads [login to view URL] and 2 .rar to it. Then it moves to the next directory, link2 and reads the text files in it. It creates c:\txt\link2\download\ and downloads [login to view URL] there. If a download directory already exists, it will skip the downloading that one. The program should be able to check if downloads are actually completed and put a list of incompleted/failed ones in a log file. One directory can contain more than one .txt file. The .txt filenames do not have any specific format. Some of the files might be .doc. It would be preferable that the project would be done in c#, but other language can be considered also if there is a good reason.