I know I am doing something stupid, but I can't get grouping to work on the Radgrid. I am trying to group by "IsDigitalOrPhysical" and Expression Blend tells me that it is not a correct property for "Customer" types. I don't even have a Customer type. See attached png please. I'm sure it's something painfully simple, but I can't get it to work.
thanks
mark
thanks
mark