I don't know if my title is possible or not. But is there any way how to get or determine the mac address of a PC?. If it is possible to determine the mac address in what way?. As my title above the scenario is after he/she click a certain button the mac address will save to sql server database or display to a label. I'm trying to do this in a project I am working at asp.net mvc3 I didn't try anything yet because I don't know where and how to start. Thanks.