.net compatibility with palm os ver5.xx

Question

hi everyone i wanted to know wether we could use .net platform for building applications for pda's using PALM OS VER 5.XX i am particularly looking for the palm zire 31 pda Also do tell me how can we build application in c# which can read information from barcodereader device.Can pda read from the barcode reader too .Please help. Any .Net Guru prsent over here to help me out.its very urgent.i need this information to make my final presentation. regards Infinity