Setting Permissions Programatically in c#

Setting a single permission is simpe "rootFolder1.Permissions = FileVistaPermissions.Full;" but how do you combine multiple permissions?

This gives a c# error.

rootFolder1.Permissions = FileVistaPermissions.Traverse + FileVistaPermissions.List;

Nevermind.  I got it.  Stupid me.  I was using the wrong operator.