Enterprise Browser does not support RFID currently. I think you are asking more about how to do it with C# native application and you have posted this question into wrong forum.
Please post this to appropriate forum.The chance of getting reply your query will be more.
We don't have much in the way of specific coding examples for RFID encoding. The best reference manual on how to do the encoding is found in the RFID Programming Manual. RFID encoding commands are in ZPL just like the label formatting. Using these commands in conjunction with your "hello world" example will give you the desired encoding & print.