Convert UTM to Longitude and Latitude

I need some one to convert UTM to Long/Lat ie the Function will ask for parameter then spit out the result It must be done in C# and SQL 2000 function please read [login to view URL] Read this part **Converting UTM to Latitude and Longitude** Also the excel file will help you Note no smelly code, i will check the result I want to pay $30.00-$40 max as the formular is given