Small software which will act as a client installed on a windows PC (xp, vista, 7). using this software, i need to be able to able to send any file or recieve.. like images or documents to/from another pc, having the same software installed.

when the receiver gets the file, a small notification popup( like how MSN messenger popup) should appear mentiong that "You received a file(image or document). On click of this notification, it should open the directory of that file.

Notes:
1. on installation of this software , should create a folder called systemroot\Data Transfer
2. All files transfered should be named as
date_time_filename.extension
3. for the clients software should have an option to store the IPs, who will send or receive to. So when entering these IPs, i will like to have a name put it to , so when i say send file/s it should show me a list who i can send it to.
4. if the user skips the notification, there should be a way he can check the last received or sent transfers.
5. a textfile db can be used.

i need this in .net or any other languages (except java)